
Leslie Winkle is the FIFTH girl
I've ever had sex with.
The Big Bang Theory Season 2, Episode 16

I was done with Latin by FIFTH grade.
The Big Bang Theory Season 3, Episode 2

lt wasn't until the FIFTH grade
that l found out she liked me too,
Breaking Bad Season 4, Episode 8

...to be picked for a game in FIFTH grade,
I'm sure you do suck.
The Big Bang Theory Season 8, Episode 3

but I spent most of FIFTH grade
with my head in a toilet.
The Big Bang Theory Season 7, Episode 2