I let you buy
feminine HYGIENE products
The Big Bang Theory Season 7, Episode 2
Third World HYGIENE.
The Big Bang Theory Season 5, Episode 1
I also have an idea for a bulk,
mail-order feminine HYGIENE company.
The Big Bang Theory Season 1, Episode 4
And after that I'll make up my own rules
of oral HYGIENE...
The Big Bang Theory Season 6, Episode 21
your personal HYGIENE or
the fact that your science,
The Big Bang Theory Season 11, Episode 17