I'm having some DIFFICULTY bonding
with a colleague at work...
The Big Bang Theory Season 2, Episode 13
that you have DIFFICULTY
being close with her.
The Big Bang Theory Season 7, Episode 21
Penny, are you experiencing
some sort of DIFFICULTY?
The Big Bang Theory Season 2, Episode 3
Does he have DIFFICULTY
maintaining erections?
The Big Bang Theory Season 9, Episode 23
but DIFFICULTY initiating a
urine stream could be a symptom
The Big Bang Theory Season 5, Episode 17