I have very strong thoughts on this subject. I think ones desire to cheat comes from what they see their parents do in life. If one parent cheats and is very open with the affair than cheating to the child becomes a normal part of relationship. If both parents are faithful in their relationship then the child is less likely to view that as normal. Same thing goes with domestic violence or anything else. It is more a case nurture than it is nature. It is not programmed in our DNA to cheat. Most of us want to be with one partner in our life. It is when the house we are raised in becomes messed up that we because messed up. That is just my thoughts on it sorry if it sounded way to textbookie.