Social CONVENTION is stupid.
The Big Bang Theory Season 5, Episode 16
I know you're not ready and I don't want you to
say it just because social CONVENTION dictates...
The Big Bang Theory Season 8, Episode 8
Try telling him
it's a non-optional social CONVENTION.
The Big Bang Theory Season 1, Episode 16
...the cultural CONVENTION
is to bring them hot beverages.
The Big Bang Theory Season 1, Episode 6
and possibly the
Geneva Convention.
The Big Bang Theory Season 11, Episode 12