An elderly couple walks into a doctor's office. The doctor asks them what is the problem. The elderly man asks if the doctor could watch them having sex.

Perplexed, the doctor agrees.

After the couple finish, the doctor says that he didn't see anything wrong. The couple thank him and leave.

The next week, the same couple go back to the doctor with the same request. Again, the doctor agrees to watch and again, when they finish, the doctor tells them that he did not see anything wrong. They thank him and leave. The following week, the same couple go back to the doctor with the same request. The doctor agrees. He watches, then when they finish he tells them that there is nothing wrong. He asks the old man what seems to be the problem. The old man tells him that they are both married and thatthe woman is his mistress, so they cannot have sex at his or her house and that a hotel room costs 35.00, and that a visit to the doctor only cost 15.00 and their Blue Cross pays for half....