The first prisoner stands and says, "My name is Daniel and I'm in for murder."

Everyone gives him approving looks and one of the other inmates pats him on the back for admitting his wrongdoing.

The next guy stands up and says, "My name is Mike and I'm in for armed robbery."

Again, there is a round of approving looks. This goes on around the circle until it gets to the last guy.

He stands up and says, "My name is Melvin, but I'm not telling you what I'm in for."

The group leader says, "Now, come on Melvin, you have to admit it to us to make any progress. Tell us what you did."

"Ok then," said Melvin. I'm in for screwing dogs."

Everyone is disgusted to hear this. One of them shouts out, "Oh that's disgusting! How LOW can you go?"

"Chihuahuas", Melvin replies.