Punters are punters, brothe crawlers are brothel crawlers (adult work being the modem brothel), in the spirit of Taylor Swift "an the punters gonna punt, punt, punt, punt, punt".
They do it with every woman they're with. They do it habitually.
It's not about you.
It's not about any java on your part. Noone can provide what a punter wants..
Because he wants sex with multiple people and sex with prostitutes. In your hs case, he'll happily take it with non prostitutes as well. Hrs even taken the variety and excitement and fix he wants from men.
So he's a habitual cheater.
He's a prostitute user.
He's gay or bi or a msm.(men who have sex with men); a man in any of those categories having a relationship with a woman who does not know he has sex with men ... is a fucking scumbag beyond scumbag.
He's just generally a fucked up scumbag.
He's a degenerate.
I wouldn't even like to begin to try to unpack what psychological issues he has - to seek sex to such an extent, outside his relationship, with prostitutes and even with men.
His issues may never be solved and you are the last person who should he expected to support him; the victim of so much infidelity, so mu h deceit, so much disrespect, so much danger to your health.