Costume Party & Happy Halloween

A couple was invited to a swanky costume party.  The Mrs. got a  terrible  headache and told her husband to go to the party alone. He being a devoted husband protested, but she argued and said she was  going to take some aspirin and go to bed and there was no need for his  good time being spoiled by not going.
So he took his costume and away he went. The wife, after sleeping soundly  for
about an hour,  awakened without pain and, as it was still early,  decided to go the
party. Since her husband did not know what her costume was, she thought she
would  have some fun by watching her husband to see how he acted when she
was not  with him. She joined the party and soon spotted her husband
cavorting around on the  dance floor, dancing with every nice woman he
could, and copping a little  feel here and a little kiss there.
His wife sidled up to him and being a rather seductive babe herself, he 
left his   current partner high and dry and devoted his time to the new
babe that had just arrived. She let him go as far as he
wished,naturally,  since he was her husband.
Finally, he whispered a little proposition in her ear and she agreed. So off
they went to one of the cars and had a quickie.
Just before unmasking at midnight, she slipped away, went home, put the  costume away and got into bed, wondering what kind of explanation he would  make for his behavior. She was sitting up reading when he came in, and she asked what kind of a  time he had.  He said: "Oh, the same old thing. You know I never
have a  good time when you're not there."
- "Did you dance much ?"
- "I'll tell you, I never even danced one dance. When I got there, I met  Pete, Bill Brown and some other guys, so we went into the den and played  poker all evening. But you're not going to believe what happened to the  guy I loaned my costume to...."