
It's NATURAL to be
a little cranky when you have...
The Big Bang Theory Season 5, Episode 12

...but that's the NATURAL reaction
of the limbic system...
The Big Bang Theory Season 3, Episode 11

Primates such as ourselves
have a NATURAL instinct...
The Big Bang Theory Season 4, Episode 19

I believe we are NATURAL allies.
Game of Thrones Season 2, Episode 5

Men brawl from time to time.
It's only NATURAL.
Game of Thrones Season 5, Episode 8