if you are a high sex drive person, just have an open serious relationship or marriage. If you have talk out your needs before marriage it will save you a lot of problem future, ie potential sexual dissatisfaction, lack of sex because frequently seeing each other

The main problem most guys cannot accept their girlfriend or wife cheating (emotionally flirting, but mostly physical) because we have fear of potential raising unknown guy's kids. What if your serious gf flirt with guys obviously in front of you? Then you should question why you picked her as main chick.

The issue is there are lot of people are not equipped to be monogamous either they forced themselves to quickly find a partner ended up cheating (cause they settled for minimum)

they dont know what they want inherently
thats why being a player is crucial. If you dont play the field you will not know who's truly compatible with you. There are also guys who just married their high school (very rare) or college gf after being together for many years, ended up divorce as well. Life is unpredictable

Its bad to follow social conditionings
But if they want to be a sheep, that's fine

agree, women tie sex with love a lot. If she decides to give herself mentally to someone its about time to hook up, she already chose to leave the bf or husband long time ago (disrespect), but its just an explanation from a traditionalist standpoint.

thats you vet a woman or guy when you want to do anything serious or business with them

i screen and communicate properly before going into a ltr, via this way i dont need to be always cautious seeking for signs of danger. Not only you discover about yourself, you are also looking for a better quality partner that can stand the test of time

Regardless becomes toxic or not, its being responsible and accountable for each choice we made.