But, out of CURIOSITY,
what is a way?
The Big Bang Theory Season 5, Episode 10
It's called
scientific CURIOSITY!
The Big Bang Theory Season 5, Episode 17
Just out of CURIOSITY, how did
you come to be on the show?
The Big Bang Theory Season 11, Episode 15
Just out of CURIOSITY
what registers as "odd" to you?
The Big Bang Theory Season 10, Episode 7
Just out of CURIOSITY, why didn't you
ask Leonard for advice about this?
The Big Bang Theory Season 8, Episode 21