Heard from my sister-in-law, cant say where she heard it.

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, Im sorry honey, Ive got a Gyn. appointment tomorrow.
The husband, rejected, turns over and tries to sleep. 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?