That woman not only had
vigorous COITUS with Bert
The Big Bang Theory Season 10, Episode 16
"Leonard, call me
if you're interested in COITUS.
The Big Bang Theory Season 4, Episode 6
COITUS portion
of your birthday festivities.
The Big Bang Theory Season 10, Episode 11
So it went beyond the mere fact
of COITUS to a blow-by-blow, as it were.
The Big Bang Theory Season 4, Episode 20
I know we only have COITUS
on my birthday,
The Big Bang Theory Season 11, Episode 11