I never understood this line
In the very beginning when the biker bullies pull up to the bar (or whatever it was) and they suggest coming in.
The blond guy, David's friend, says to him, "Well, your sister can come in but she'll have to wash her hands first." What the heck does that mean?
If he's implying that his sister is a slut or gets around, why would he say wash her hands, of all things?!! Why not "wash her mouth out"?