Not sure where this one falls but it must be right up there...
"That He'll Fail to Perform in the cl**tch
When a man can't rise to the occasion he feels about as useful as a '63 Oldsmobile with rusted spark plugs. But before you put him up on blocks, reassure him that more than 1 in 10 will have trouble with erectile dysfunction at some point in their lives, and the other 9 guys out of 10 have good reason to be concerned as well."