Marriage is sex slavery.

You wonder if wife is happy with husband to make gym for 3 hours and come home, but next time very upset if man visited neighborough and had a sex with beautifull woman. What is different between gym and sex??? Sex is natural energy as will to work....somebody like to work more, or sport more, or sex more.....relationship between people wouldnt be conditioned by sex..that make marriage very ugly relationship. Sex is only fun.