
Ask him for a NAPKIN, I dare you.
The Big Bang Theory Season 1, Episode 2

Yeah, he's writing it on
a NAPKIN like in the movies.
The Big Bang Theory Season 12, Episode 17

What NAPKIN?
The Big Bang Theory Season 12, Episode 17

Oh, damn it. Can I have a NAPKIN?
The Big Bang Theory Season 3, Episode 5

It's nice to have dinner with a boyfriend
of Penny's that knows how to use a NAPKIN.
The Big Bang Theory Season 4, Episode 9