It's only NATURAL.
The Big Bang Theory Season 12, Episode 12
Sweetie, this is a NATURAL thing to feel.
The Big Bang Theory Season 6, Episode 24
...but that's the NATURAL reaction
of the limbic system...
The Big Bang Theory Season 3, Episode 11
But it's NATURAL,
boys having a go beneath the sheets.
Game of Thrones Season 3, Episode 6
Look, Mr. Natural, I'm not
gonna let you sabotage this thing.
Breaking Bad Season 5, Episode 11