your personal HYGIENE or
the fact that your science,
The Big Bang Theory Season 11, Episode 17
And after that I'll make up my own rules
of oral HYGIENE...
The Big Bang Theory Season 6, Episode 21
I let you buy
feminine HYGIENE products
The Big Bang Theory Season 7, Episode 2
I must take responsibility. I had to stop
for feminine HYGIENE supplies.
The Big Bang Theory Season 4, Episode 3
I'm scrupulous about my HYGIENE,
I regularly disinfect my hands...
The Big Bang Theory Season 3, Episode 15