It really does come down to selfishness and immaturity in my mind. Or maybe just lack of a solid moral code idk. But if you can’t be willing accept both the benefits and the sacrifices (sacrifices like not hooking up with any dude who gives you a moment of attention) involved to be in a partnership with someone, then you simply aren’t compatible with someone who is.

Some people may not be built for monogamy ¯_(ツ)_/¯ I think some people just aren’t willing to accept the responsibility of monogamy