The average person doesn't cheat and doesn't want to fuck 50 people.
But if you aren't in a community of stable people with stable lifelong relationships, you wouldn't intuitively know that. We naturally distrust individuals. For most of our history we stuck together in tribes and bands, we didn't exist like this without any enforced social norms. We never had to find out about people and their minsets to this extent.
This is why religious people tend to have better relationships and life outcomes.
They belong to a group of dedicated people that strive to enrich their community through a set of rules and guidelines. You meet a religious and faithful Christian or Muslim, you know what they are about.
None of the issues regarding dating or sexual immorality is about choosing the right person or the right mindset.
It's about how do you navigate a world where anything goes and no one has to be accountable to anyone or anything because there's no community.
How do you balance fulfilling your desires and holding yourself to a standard of decorum?
Lol, like how many times you gonna sit here and find out your shorty was popping ass 2AM and getting numbers before you believe these hoes ain't loyal?