Does he have DIFFICULTY
maintaining erections?
The Big Bang Theory Season 9, Episode 23
Does it involve DIFFICULTY
initiating a stream of anything?
The Big Bang Theory Season 7, Episode 7
That's even factoring in your DIFFICULTY...
The Big Bang Theory Season 4, Episode 9
that you have DIFFICULTY
being close with her.
The Big Bang Theory Season 7, Episode 21
My objection was based
on considerations other than DIFFICULTY.
The Big Bang Theory Season 3, Episode 1