I clearly woke you up
in the middle of a REM CYCLE.
The Big Bang Theory Season 1, Episode 10
Now, if you assume 15 tampons per CYCLE
in a 28-day CYCLE...
The Big Bang Theory Season 1, Episode 4
Oh, yes, you are. I track your CYCLE.
The Big Bang Theory Season 10, Episode 8
Where are you in your menstrual CYCLE?
The Big Bang Theory Season 2, Episode 9
Now, if you assume 15 tampons per CYCLE
in a 28-day CYCLE...
The Big Bang Theory Season 1, Episode 4