Exactly! There's was a movie I saw years ago about the Aztec Indians I guess where the mother in law really wanted a grandchild. The husband and wife were in their tent and the daughters mom was standing outside of it. "I'm not leaving this spot  until I have a grandchild." Then the daughter comes out and talks to her mother basically saying her husband can't "perform" with her standing outside. He couldn't do it with her standing outside.  How the hell can a man do it with her essentially watching them?