...but he was telling me that he used to work with a guy who's wife was a nymphomaniac.

He found out because this guy would go home for lunch - every day. Every time they invited him to go to lunch with a group of them, he'd decline. So he was giving the guy a hard time once for never accepting, and the guy explained that he and his wife had an understanding. He needed to be there for her twice a day. And since he left for work earlier than she woke up in the morning - it was lunch and bedtime.

The guy I knew was all "yeah, baby!". But his co-worker responded with - twice a day every single day may seem nice, but it sure does limit you in some ways. Like not going to lunch with co-workers.