"Fire" is probably a really good characterization of Jessie. After all, fire is necessary for safety, survival, and sometimes just for looking at, but if you play with it too long, you're going to get burned. Below are pix and clips of James basking in Jessie's presence, as well as James getting positively immolated.

Bringing on the Pain: James has a big red mark on his face from Jessie's fan (12: Here Comes the Squirtle Squad) - Jpeg Jess sledges James with a massive hammer, breaking his neck (15: Battle Aboard the St. Anne) - Jpeg Jessie slaps James in the face- to stop his hysteria, of course... (16: Pokemon Shipwreck) - Jpeg James doesn't look like he appreciates Jessie sitting on his butt (18: Tentacool and Tentacruel) - Jpeg Jessie attempts to strangle James with her thighs (25: Pokemon Scent-sation) - Jpeg James can't support Jessie's weight for the whole episode - he ultimately starts buckling (28: The Punchy Pokemon) - Jpeg1 - Jpeg2 Jess punches James for implying that they were losers (37: The Battling Eevee Brothers) - Jpeg Meowth and James both have red cheeks (no, not that kind) from Jessie's slapping (SP2: Snow Way Out!) - Jpeg Jessie doesn't appreciate that James thinks they're doomed (43: Attack of the Prehistoric Pokemon) - Jpeg Jess lands a flying side kick on James (47: Who Gets to Keep Togepi) - Jpeg Calling Jess an "old bat" is the wrong move (53: The Ultimate Test) - Jpeg Jess slaps James down for being grateful to the twerps (57: Beach Blank-Out Blastoise) - Jpeg It's unwise to tell Jessie she has a lousy personality (76: Friend and Foe Alike) - Jpeg An irate Jessie tries to force a grapefruit down James' throat (91: Snack Attack!) - Jpeg Physics be damned - Jessie whips James around in the air like a rag doll (93: Meowth Rules) - Jpeg1 - Jpeg2 Jessie, supposedly sick, kicks James repeatedly (107: Stun Spore Detour) - Jpeg Evidently, James will not get his nachos (109: Enter the Dragonite) - Jpeg James and Meowth root for the twerps, and large glowing lumps are their reward (110: Viva Las Lapras) - Jpeg Jess stomps James' foot for almost saying too much (115: The Double Trouble Header) - Jpeg Jessie slaps James down for making a dumb content (133: Charizard's Big Upset) - Jpeg Jessie hits James with a big ol' mallet (138: Good 'Quil Hunting) - Jpeg Jess has James in a chokehold (157: Air Time) - Jpeg J and J have a fight (which will make their balloon capsize) (169: Mountain Time) - Jpeg Awww... it HURTS Jamie when you freeze his face like that... (174: Wings 'n' Things) - Jpeg James and Meowth really shouldn't have drunk all the water... (183: The Light Fantastic) - Jpeg Jessie silences James before he blows their cover (186: Spring Fever!) - Jpeg Seeing stars! James gets whacked by both Jessie and Meowth. (195: The Art of Pokemon) - Jpeg Jessie stomps on James' foot, hard. (208: Fly Me to the Moon) - Jpeg Jess hits a petulant James and Meowth over the head with a fan. (209: Takin' it on the Chinchou) - Jpeg1 - Jpeg2 Jessie beats James down with her hair (228: Dues and Don'ts) - Jpeg1 - Jpeg2 James controls Jessie with her lil' bondage device (244: Outrageous Fortunes) - Jpeg - Wav Jess has punched James in the face for suggesting that she trade Arbok (257: Here's Looking at You, Elekid) - Jpeg Jess, James, and Meowth all squabble over a peach (Pokemon 4Ever) - Jpeg Yelling, Back and Forth: Jessie's yelling so hard, she looks like she might eat him (15: Battle Aboard the St. Anne) - Jpeg Jessie chastises James for being scared (16: Pokemon Shipwreck) - Jpeg James is calling Jessie and Meowth imbeciles (45: Holy Matrimony!) - Jpeg Jessie's scary when mad! (?) - Jpeg James tells Jess she has "thin skin" (91: Snack Attack!) - Wav James is not allowed to have a day off (95: A Way Off Day Off) - Jpeg Jessie, too nasty for love? She'll show James otherwise... (97: Wherefore Art Thou, Pokemon?) - Jpeg James can't do anything right (105: Pokemon Double Trouble) - Jpeg - Wav Jessie says that James is "No man" (105: Pokemon Double Trouble) - Wav Jessie's frustration makes James cry (113: The Rivalry Revival) - Jpeg Jessie and Meowth both try to strangle James (114: Don't Touch that 'Dile) - Jpeg James complains about Jessie's lousy attitude (117: Roll On, Pokemon) - Wav Jessie's a bit peeved when James claims his rich childhood was difficult (121: Snubbull Snobbery) - Jpeg1 - Jpeg2 Of course Jessie sacrifices as much as everyone else! Don't question her again, James! (130: Tanks a Lot!) - Jpeg Jessie doesn't appreciate the whining (142: A Farfetch'd Tale) - Jpeg Jess insists that she's not the cause of all of James' troubles (152: Forest Grumps) - Jpeg Jess is actually yelling at the Sudowoodo here, but it really scares James (152: Forest Grumps) - Jpeg Damn! Jess doesn't think James has a brain! (160: Fossil Fools) - Wav James wishes James and Meowth would shut up (160: Fossil Fools) - Wav Jessie already HAD her idea, James! (161: Carrying On!) - Jpeg Wait, that doesn't rhyme with "itching" ... oh. (167: A Better Pill to Swallow) - Wav Don't "live for today," James, just live. (169: Mountain Time!) - Wav Really, Jessie. He DOESN'T know anything. (169: Mountain Time!) - Wav She's yelling at him, but looks like she's eating him (171: Imitation Confrontation!) - Jpeg1 - Jpeg2 How mean- Jessie thinks James is worthless (175: The Grass Route) - Wav Jessie, basically saying "don't talk about me behind my back!" (186: Spring Fever!) - Jpeg Jessie screams that she can't ever count on James (or Meowth) (209: Takin' it on the Chinchou) - Jpeg - Wav James is sick of Jessie's fantasies of fame and fortune (210: A Corsola Caper!) - Wav James is not permitted to whine about the uniforms (218: A Parent Trapped) - Jpeg Nor may he try to calm an irate Jessie (218: A Parent Trapped) - Jpeg1 - Jpeg2 Jess sez: Do the blowing, dammit! (218: A Parent Trapped) - Jpeg Jessie's an ice queen, sez James (235: Nice Pryce, Baby) - Wav Jessie's enormous head is yelling at James and Meowth (245: One Trick Phony) - Jpeg Jessie threatens to put a donut through James' head (248: Fangs for Nothin') - Jpeg - Wav Jess doesn't appreciate James challenging her authoritah (251: Why? Wynaut?) - Jpeg - Wav Jess yells at a cowed James and Meowth to stop daydreaming (257: Here's Looking at you, Elekid) - Jpeg James protests loudy - directly into Jessie's ear (263: Love, Pokemon Style!) - Jpeg Jessie's question and massive head scare the crap out of James (AG001) - Jpeg Unnecessary Physical Contact (Mostly Fear Hugs): They're EVER so distraught that they had the lowest scores ever (9: The School of Hard Knocks) - Jpeg J and J do a little ballroom-y dance (11: Charmander, the Stray Pokemon) - Jpeg Well, they're about to die, so I guess the hug's acceptable (16: Pokemon Shipwreck) - Jpeg Well, that massive pikachu IS pretty scary (17: Island of the Giant Pokemon) - Jpeg They really want a vacation (26: Hypno's Naptime) - Jpeg They didn't get to cause destruction? Awww... (30: Dig those Diglett) - Jpeg James wants to see that picture of Jessie's crush (35: Ditto's Mysterious Mansion) - Jpeg First they're all happy that they caught a magmar, then they have to hug because it's going to kill them (56: Volcanic Panic) - Jpeg1 - Jpeg2 They imagine being able to be the boss (69: Ancient Puzzle of Pokemopolis) - Jpeg J and J goin' down together (wait, that doesn't sound right) (86: Pikachu Re-volts!) - Jpeg They just won the World Series (wait, they don't play baseball) (115: Double Trouble Header) - Jpeg Yes, I'm sure the Snubbull's very scary (121: Snubbull Snobbery) - Jpeg But a Primeape's even worse (133: Chicorita's Big Upset) - Jpeg J and J go down together again (139: Shadow of a Drought) - Jpeg They're... trying to get warm... and Articuno's really scary (187: Freeze Frame!) - Jpeg That jigglypuff is so damn scary it warrants a hug (220: Throwing in the Noctowl) - Jpeg ...about to be frozen by multiple ice pokemon (235: Nice Pryce, Baby) - Jpeg Uh, planning to help save the world usually doesn't require so much intimate contact. (2nd Pokemon Movie) - Jpeg1 - Jpeg2- Jpeg3 Uh, wow, the hugs get intense when you're about to die (2nd Pokemon Movie) - Jpeg Sweet Words: James IS the best, Jess; thanks for noticing (16: Pokemon Shipwreck) - Jpeg - Wav Jess really cares. (19: Ghost of Maiden's Peak) - Wav Jess thinks James did a good job (120: Spinarak Attack) - Jpeg - Wav James just wants Jess to be proud of him (130: Tanks a Lot!) - Wav James praises Jessie's alliteration (219: A Promise is a Promise!) - Wav Jim thanks Jess for a pep talk (AG002) - Wav Other Stuff With the Gruesome Twosome: Making fun of Misty, they look very smug (2: Pokemon Emergency)- Jpeg Making relly odd, horrified expressions (7: The Waterflowers of Cerulean City)- Jpeg Some woman is always giving you trouble? Really... (19: Ghost of Maiden's Peak) - Wav They loked scared out of their minds (22: The Tower of Terror) - Jpeg Looking distraught and confused (41: The Problem With Paras) - Jpeg They are way happier than they ought to be (42: The Song of Jigglypuff) - Jpeg What if they were a chimera? *shudder* (79: A Scare in the Air) - Jpeg Doing a very strange modern dance (85: The Crystal Onix) - Jpeg They have a nice little bed and breakfast together *really cute* (186: Spring Fever!) - Jpeg Taking synchronized swimming too far: they drown while doing the motto (203: The Joy of Water Pokemon) - Jpeg James decides HE'LL take charge O.o (249: Great Bowls of Fire) - Jpeg