
She has COITUS one time,
suddenly she's Gloria Steinem.
The Big Bang Theory Season 10, Episode 5

Sounds like the night we had COITUS.
The Big Bang Theory Season 10, Episode 9

Technically,
that would be COITUS interruptus.
The Big Bang Theory Season 1, Episode 1

Also, if they did have COITUS, we'll
all be needing a skilled psychiatrist.
The Big Bang Theory Season 10, Episode 1

That woman not only had
vigorous COITUS with Bert
The Big Bang Theory Season 10, Episode 16