Penny, are you experiencing
some sort of DIFFICULTY?
The Big Bang Theory Season 2, Episode 3
that you have DIFFICULTY
being close with her.
The Big Bang Theory Season 7, Episode 21
That's even factoring in your DIFFICULTY...
The Big Bang Theory Season 4, Episode 9
I have such DIFFICULTY
speaking to women...
The Big Bang Theory Season 1, Episode 6
Does it involve DIFFICULTY
initiating a stream of anything?
The Big Bang Theory Season 7, Episode 7