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

if someone wanted to use Sheldon
as their SPERM donor?
The Big Bang Theory Season 12, Episode 12

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

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

I will find an appropriate SPERM donor
for your eggs...
The Big Bang Theory Season 1, Episode 15