
It's called
scientific CURIOSITY!
The Big Bang Theory Season 5, Episode 17

Where is the CURIOSITY?
The Big Bang Theory Season 4, Episode 21

Just, uh, out of CURIOSITY,
did he ever have a shot with you?
The Big Bang Theory Season 2, Episode 8

Just out of CURIOSITY, why didn't you
ask Leonard for advice about this?
The Big Bang Theory Season 8, Episode 21

Just out of CURIOSITY, how did
you come to be on the show?
The Big Bang Theory Season 11, Episode 15