
I know....SPERM.
The Big Bang Theory Season 12, Episode 12

Um, is this the high-IQ SPERM bank?
The Big Bang Theory Season 1, Episode 1

You're paying?
Have you been selling your SPERM again?
The Big Bang Theory Season 2, Episode 22

- Are you still mad about the SPERM bank?
- No.
The Big Bang Theory Season 1, Episode 1

Oh, maybe I could sell my blood and SPERM!
The Big Bang Theory Season 10, Episode 17