Sex Joke

One night, as a couple lay down for bed, the husband gently taps his wife on the shoulder and starts rubbing her arm. 

The wife turns over and says: "I'm sorry honey, I've got a gynecologist appointment tomorrow and I want to stay fresh." 

The husband, rejected, turns over and tries to sleep. 

A few minutes later, he rolls back over and taps his wife again. This time he whispers in her ear: "Do you have a dentist appointment tomorrow too?"