to throw a bone in the shower?

Question

The following terms are new to me:

to throw a bone in the shower(s)
to jump one's bones in the shower
to bone in the shower

They seem to mean sex-related matters, can anybody tell me what they exactly mean in plain English expression? and how the "bone" and "shower" have something to do with that?

Answer 1

This is a term meaning anal sex between two men...in the shower...sometimes forcibly (meaning rape)