See? It's right here after
"providing a confirmation SNIFF
The Big Bang Theory Season 5, Episode 15
SNIFF that business?
I don't think so.
The Big Bang Theory Season 12, Episode 10
I know one way to find out. Sniff this.
The Big Bang Theory Season 9, Episode 18
if instead of talking we could
just SNIFF each other's butts?"
The Big Bang Theory Season 7, Episode 12
And I watched you SNIFF Joe's
hair when he wasn't looking.
The Big Bang Theory Season 12, Episode 16