Marvin and Shirley are at birthing classes and the session is in full swing. Betty, the instructor, is teaching the women how to breathe properly, and the men how to help their wives and give them confidence.
Betty then announces, "Ladies, I've told you this before, but it won't hurt if I tell it to you again. Exercise is extremely good for you. Walking is especially beneficial. And you men here. (pause) It wouldn’t hurt you to find the time to take your partners on a nice walk."
The room immediately goes quiet. But then Marvin raises his hand and asks, "Betty, is it ok if my Shirley carries a golf bag while we walk?"