Maybe he was too busy
writing clumsy PENIS metaphors
The Big Bang Theory Season 5, Episode 1
Oh... Someone drew a PENIS in it.
The Big Bang Theory Season 10, Episode 19
She never even got to see my PENIS.
The Big Bang Theory Season 4, Episode 22
I've got a robot hand
grasping a man's PENIS out here.
The Big Bang Theory Season 4, Episode 1
Looks like someone drew a PENIS on him.
The Big Bang Theory Season 3, Episode 17