If you've ever seen the episode where Jerry is going out with Elaine's sister, Holly, there's a lot of debate over the meat issue. Jerry and Elaine are having lunch at Monk's and he orders a Veggie burger and a Grapefruit.
Elaine: "What is this?" Jerry: "Veggie burger and a grapefruit." Elaine: "What are you turning into?" Jerry: "A healthy person."
This is the episode where George gets squirted in the eye by that same grapefruit.
George: "...yeah, you musta squirted a piece of pulp in it too..." Jerry: "Pulp couldn't make it across the table." George: "Pulp can move baby!"
Then later, Jerry and Holly are having dinner and Jerry just desides to order a Salad, saying that he's not much a meat eater.
Holly: "You're not one of...those..." Jerry: "No, I'm not one of...those..."
Which I assumed to mean vegitarians. Later, he hid the mutton that Holly made him and Elaine for dinner in the pockets of his jacket. Then, at the end of the episode, he's hiding porkchops inbetween the coushins of his couch.
So, I don't think Elaine is because she makes fun of him in the beginning, and also eats the mutton. Jerry...I dunno. I've seen him meat on the show before, he always has somekind of sandwich at Monk's, but in this episode he won't touch it. Often on the show they have an episode that goes way out of line in referance to other episodes. Like the debate as to whether or not Kramer takes baths. One episode he says that it's all he takes. Then another has him saying that he can't stand the thought of them. The writers sometimes go away from what's already been set down in older episodes, probably just because they can often make whatever they're talking about pretty funny. Sorry that whole thing is so long. Hope it answered whoever's question! :)
Rob :)