
Have you had COITUS with any of them?
The Big Bang Theory Season 9, Episode 9

Frequent COITUS dramatically increases
the odds of fertilization.
The Big Bang Theory Season 1, Episode 15

You're kidding! What kind of maniacs
have COITUS in someone else's bedroom?
The Big Bang Theory Season 9, Episode 16

Can we please just stop saying "COITUS"?
The Big Bang Theory Season 1, Episode 1

I find the concept of COITUS ridiculous
and off-putting.
The Big Bang Theory Season 6, Episode 20