Because he makes all the ladies wet.
Because when they're born they get laid.
She wanted to lay it on the line.
Don Juan de Marco Polo.
When your bald!
He used a skeleton key.
Par**ty.
The Nun has hope in her soul and the lady taking a bath has soap in her hole.
This joke makes more sense if you can see it in person, but we'll give it a shot, anyway. Use your imagination. Why do the ladies love Jesus? Because he was hung like this!