This is true.
but I hugely under estimated how disrespectful, sexist and in denial of their own feelings many men are.
i think my story is a bit different to the experienced the OP had.
Some men completely use sex as a power kick and are emotionally disconnected. I was pretty good and spotting those ones and kicking them to the curb.
i never two timed, never knowingly got involved with someone else’s boyfriend (though they sometimes pursued me) never carried on seeing someone if I wasn’t that into it.
i also realised much later some of those things were mistakes. I briefly had a nice but dull boyfriend in my early 20s.
when I met someone I had better chemistry with a couple of months in I did the honourable thing and broke up with him before going on a date with chemistry guy.
who ghosted me two dates later.
i now realise I could have explored things with chemistry guy without being so straight up.
i should have dated dull boyfriend longer and in doing so repositioned myself in my wider social circle as girlfriend material.
and from there likely traded up to someone more right for me.
ive seen men get emotionally involved with someone who has a girlfriend. And THEN when she eventually becomes available things move quickly but he’s already bought in.
lots of friends who ‘valued themselves’ too much to have sex on a first date ran their entire love lives like this.
Mumsnet often advises people dating not to play games.
but in my experience there IS a game, it’s still based on sexist and misogynistic tropes - as new posters to the thread are proving.
some people understand this better than others but if you don’t play it you loose out.