A man was prescribed V1agra by his doctor who told him to take it one hour before sex.  The man collected his prescription and went home to wait for his wife to get home from work. An hour before she was due home, he took the V-pill.  But just as he was expecting her, she called to say that she wouldn't be in for another 2 1/2 hours.  In panic, he phoned the doctor. "what should I do? he asked. "I've taken the pull but the effects will have to worn off by the time my wife gets home."  "I see," said the doctor. "It is a pity to waste it. Do you have a maid?"  "Yes."  "Well, could you not occupy yourself with her instead?"  "But I don't need V1agra with the maid."