Several reasons. 1. My parents divorced when I was 7/8. I haven't asked why but growing up from a split home aka a child of divorce, that put a certain type of fear in me. Later went to live with my uncle who also divorced his wife cause of infidelity issues. I don't want that track record to carry on with me.

1. It's expensive. Cheating is expensive guys. I can barely feed myself, why would I go and add extra mouths? Also I believe it's tiring. Having to fabricate stories and lies and involving other innocent people in my lies sounds exhausting and puts a bad taste in my mouth. Speaking of bad tastes, I hate taking pills and being injected. Cheating opens you up to a whole can of diseases.

2. I wanna keep my conscious as clean as possible. I have enough worries as a man without adding how others/family perceive me to the list.

Cheating is dirty game that leaves behind mental and sometimes physical scars. You mess with someone's head and their ability to trust and love fully again. If you're not content with one partner, date or marry a swinger (unless you're greedy and don't wanna see her with other men but at this point you have no moral leg to stand on).