Two tramps walking down a road feeling sorry for themselves since they've had nothing to eat for 2 weeks.

Two tramps walking down a road feeling sorry for themselves since they've
had nothing to eat for 2 weeks.
Then one of them spots a dead dog lying by the side of the road. He rushes over to it, pulls of a leg and starts chewing.
The other tramp looks on in disgust not wishing to join in on the feasting.
His friend looks up from his meal and asks, "Dont you want any?".
He says nothing, but screws up his face and turns away.
After his friend has eaten all he can they both continue on their journey down
the road.
They haven't gone far when the tramp who ate the dog throws up on the road.
His friend bends down and starts to eat the bits of meat in the sick.
The other tramp looks on in wonder and finally ask his friend, "I thought you
didn't like dead dog?".
"I do..", says the other tramp, "But only when it's warm!".