My friend Dave sent me this joke.

[Grant Tarredus]

I went to the doctor and he said to me “David, you have to stop masturbating.”
“Why?” I asked him.
“Well, I need to examine you now.”
Pause.
Laughter.

 

[Grant Tarredus]

A guy named Lance laughed out loud at that joke, and it sounded exactly like this.
https://www.dropbox.com/s/rjlzu2yzyymdwfa/Lance laughs.m4a?dl=0