Miracle Drug

So this lady goes to her doctor and explains that her husband can't get it up
like he used to and their sex life is suffering. The doctor asks, "Have you
heard of a new drug named Zyban?" The lady says yes, but adds that her husband
refuses to take pills of any kind, and certainly won't take anything that "will
make him feel like less of a man." The doctor advises the woman to slip it into
his morning coffee when he isn't looking. The woman is nervous, but the doctor
insists, "it will change your life within a day," so she figures she'd better
try it.
A week goes by and the lady shows back up at the doctor's office and the
doctor asks her how it went. The lady heaves a tremendous sigh and explains, "I
snuck it into his coffee like you said. And, sure enough, within 15 minutes, he
cleared off the table, threw me on it and we had the best sex we'd had in 20
years." Perplexed, the doctor asks, "What's wrong with that?" And the lady
shakes her head and says, "I don't think I�ll be able to show my face at
McDonalds again."