A group of four men often got together to play racquetball. After
the game, three of the men showered in the locker room, and then
went and had a few drinks in the club bar. After this had been
going on for some time, one of the three men asked the man who
always left first, "How come you never hang around and get
showered and have a few drinks with us?"

The fourth man seemed a little embarrassed, but he admitted that
he didn't want to be seen in the shower with the other men
because he felt his penis was too small.

So the first man asked, "Does your penis work?"

"Of course," said the fourth man, "it works extremely well."

So the first man asked, "Would you like to trade it in for one
that looks great in the shower?"