Preventing cheating is about not getting into situations where cheating is likely. That means obviously you can have friends of the opposite gender but you should avoid certain situations. I never believe anyone who says "it just happened," because most of the time there was a clear path leading to that situation.
This is my kind of mindset, based on how I was raised and my dad (and other family members) cheating when I was a child.
I don't think cheating often starts with someone deciding they want to go out n cheat. we're complex creatures, romance/sex is complex. saying "that will never happen!" and not looking at your behaviour doesn't really help.
what do you think about couples that elect no opposite sex friends. As in singular. The gf having no male friends separate from the bf.
I've never dated but the idea that someone can't have any opposite-sex friends is wrong to me. people of the opposite sex aren't just there to know if you wanna date and marry them, they're interesting people in their own right as friends. If I were to date someone like that, that'd cut off friendships I've had my whole life. That kind of requirement cuts off community for many people.
But circling back to what Calmdown said, having friends of the sex you're attracted to comes with the responsibility to avoid certain situations. If I we're dating I wouldn't want to be hanging out alone with a friend of the opposite sex, even if just to avoid people getting the wrong idea. (I think it humiliates people to give them or others reasons to doubt you as their partner.)
Applies also to my friends who are like family to me, who the idea of dating disgusts me (for lack of a better word). I wouldn't cultivate dating-type situations with them even if to me it's entirely platonic and I have no intentions to pursue them.
There's nothing a partner can do to prevent cheating. Restricting/controlling someone won't change their mind about anything and is it going to build trust that's needed in a relationship? no, probably not. It's each one's responsibility to be trustworthy and show it. doing stuff like that pushes people further away from eachother.
That’s an awful lot of monitoring, control and social restriction (that’s the part that’s really unhealthy) for what benefit?