This guy goes to a doctor and says he has a problem with sex.
"Doc, I think my tool is just too damn small," he says.
The doctor asks him which drink he prefers.
Well, American beer," he replies quite bemused
.
"Aaaahhh. There's your problem, it shrinks things, those silly American beers.. you should try drinking Guinness.
That makes things grow."
Two months later the chap returns to the doctor with a big smile on his face.
He shakes the doctor by the hand and thanks him.
"I take it you now drink Guinness?" asked the doctor.
~
"Oh no, Doc," replies the man, "but I've got the wife on American beer!"