Is it ok for SO to get nudes and want to fuck the girls?

I am at my limit here...too much cheating has been going on and it honestly breaks my heart.

We have everything together, we are in love with each other, yet he can’t stop being overly sexual like this. Even if we have sex 3 times a day he still wants to look at them to masturbate, he still talks to others, he still flirts and acts single, he used to go out on dates and stay at others place when we started dating, yet he is romantic and loving and affectionate? He is thoughtful and understanding? How????

My mind and heart are confused and hurt.

No matter what I do he doesn’t stop. I tried talking, demanding, threatening, being apart, giving him more love, nothing.

I don’t know if it’s me at this point. Why can’t I be the only one in his eyes just like he is for me. I really don’t know what to do.

Can someone please help me.