Technically,
that would be COITUS interruptus.
The Big Bang Theory Season 1, Episode 1
She has COITUS one time,
suddenly she's Gloria Steinem.
The Big Bang Theory Season 10, Episode 5
...I want to have COITUS with Amy.
The Big Bang Theory Season 8, Episode 1
Can we please just stop saying "COITUS"?
The Big Bang Theory Season 1, Episode 1
you haven't had COITUS on?
The Big Bang Theory Season 7, Episode 18