Muscle Contraction

Professor Higgins at the University of Sydney was giving a lecture on 'Involuntary Muscle Contraction' to the first year medical students.  This was not an exciting subject and the professor decided to lighten up the mood.  He pointed to a young woman in the front row and asked,  "Do you know what your asshole is doing while you're having an orgasm?"
She replied, "Probably golfing with his buddies."
It took 45 minutes to restore order in the classroom.

Respectfully Cheating

Jack and Betty are celebrating their 50th wedding anniversary. "Betty, I was wondering, have you ever cheated on me?" "Oh Jack, why would you ask such a question now? You don't want to ask that question." "Yes, Betty, I really want to know. Please." "Well, all right. Yes, 3 times." "Three? When were they?" "Well, Jack, remember when you were 35 years old and you really wanted to start the business on your own and no bank would give you a loan? Remember how one day the bank president himself came over to the house and signed the loan papers, no questions asked?" "Oh, Betty, you did that for me! I respect you even more than ever, that you would do such a thing for me! So, when was number 2?" "Well, Jack, remember when you had that last heart attack and you were needing that very tricky operation, and no surgeon would touch you? Remember how Dr. DeBakey came all the way up here, to do the surgery himself, and then you were in good shape again?" "I can't believe it! Betty, I love that you should do such a thing for me, to save my life! I couldn't have a more wonderful wife. To do such a thing, you must really love me darling. I couldn't be more moved. When was number 3?" "Well, Jack, remember a few years ago, when you really wanted to be president of the golf club and you were 17 votes short?"

The Mailman Here?

Husband:  Honey, has the mailman come yet?
Wife:  No, but he's panting and sweating pretty hard.