good question....

[Garretts_turbo]

A young boy knows about sex and where babies come from because
his mother told him that, "The man puts his penis inside the
woman and she gets pregnant."

A few days later, after pondering this for some time, the boy
asks in all the innocence and wonder of a child... "Does the
man ever get his penis back?"

[geekdiggy]

"of course he does ya stupid kid, it's a slut machine not a slot machine "