Penny, are you experiencing
some sort of DIFFICULTY?
The Big Bang Theory Season 2, Episode 3
My objection was based
on considerations other than DIFFICULTY.
The Big Bang Theory Season 3, Episode 1
That's even factoring in your DIFFICULTY...
The Big Bang Theory Season 4, Episode 9
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