We can't say penis? Cock? Dick? Disco Stick?
The Y chromosome is actually slowly evolving away and within a million years will be completely gone scientists think... so... yeah...
"Disco stick"??
Having lived through the disco era, you'd think I'd have heard that one before.

Okay, I was in grade school, but....actually BECAUSE I was in grade school back then, you'd think I'd have heard that one before.
It's from the Lady Gaga song, Love Game, I was listening to it at the time.
"Let's have some fun, cuz faith is sick, I want to ride your disco stick. Don't think too much just bust that stick, I want to ride your disco stick."