
Look, Sheldon, sweetie,
I know you're feeling INSECURE...
The Big Bang Theory Season 3, Episode 13

I can't believe you'd say that. You know
how INSECURE I am about my insecurities.
The Big Bang Theory Season 8, Episode 6

...that makes you a little INSECURE.
The Big Bang Theory Season 8, Episode 6

But when you're INSECURE,
The Big Bang Theory Season 10, Episode 19

No, no, then he's gonna think
I'm too INSECURE
The Big Bang Theory Season 12, Episode 5