I like the honesty of your post. I think Mr. Sunbuckus feels exactly the same way that you do. He's happy that I am having fun sometimes but when it gets to the point that I'm having more fun than he, then it gets upsetting and I can understand that. I think one of the reasons this may be the case for a lot of males is because males enjoy sex just as much as women. They want their piece of pie. If it were some other activity, maybe shopping, getting their nails done, or rock climbing and the husband has zero interest in it, they don't mind telling the wife to go have a fun time. They know that they wouldn't have any fun doing those activities so they are more than happy to let the wife go and do it by themselves or with like-minded friends. Meanwhile, when the wife is out, the husbands are out doing something they find fun; watching tv, doing some kind of sport, playing computer/console games. Thus, with swinging, men can feel jealous/upset that the wife is getting more action than they are because they want to have that kind of fun as well.