I can't stop cheating on my girlfriend
Why would you keep cheating on her?
I've checked my family history and I found out my genes have this pattern of men cheating on their spouses and girlfriends all the time.
Family patterns and genes determine what you will do as well, it's a fact. Cheating should be stopped, you should break this pattern now. Too much turmoil will ensue if you don't, and people will be hurt and never trusting again.
Science is a beautiful thing. I'll keep doing it, who cares about morality?
If you keep cheating you are going to break a lot of hearts. Why not just stay single and sleep with whomever you want without hurting someone?