Dead dog
Two tramps are walking along the highway. They haven't eaten for about two weeks and are both starving hungry. All of a sudden they see a dead dog, slightly squashed, lying near the kerb on the road ahead. It's been quite warm lately, and they can soon smell it as well as see it. One of the tramps nevertheless runs up to the dog and starts tearing bits off and wolfs them down, hardly chewing the meat. He realises he's been a bit greedy and apologetically gestures to the other tramp, who has by now caught up with the first one, to join him in eating the dog. The second tramp shakes his head and says, "No thanks, but you go ahead." The first tramp continues until he's had enough, having eaten almost all of the dog. The two tramps then continue on their way. After about half an hour the first tramp starts to heave and is soon violently sick, throwing up bits of half-chewed dog all over the road. The second tramp dives onto the mess and starts gobbling up the bits as fast as he can. "I thought you didn't like dead dog," says the first tramp. The second replies, "I don't .... cold."
[You might need to practise saying the last line with just the right intonation.]