Penny, are you experiencing
some sort of DIFFICULTY?
The Big Bang Theory Season 2, Episode 3
I'm having some DIFFICULTY bonding
with a colleague at work...
The Big Bang Theory Season 2, Episode 13
Does he have DIFFICULTY
maintaining erections?
The Big Bang Theory Season 9, Episode 23
I have such DIFFICULTY
speaking to women...
The Big Bang Theory Season 1, Episode 6
My objection was based
on considerations other than DIFFICULTY.
The Big Bang Theory Season 3, Episode 1