Hello @InSearchOfSmth87 I say this with a heavy heart, but I have been married to someone who is essentially a sex addict, for many years. Unfortunately, like many other addictions I assume, they cannot just give up on the way that they have for getting turned on, in order to be able to have an orgasm.
As you must know OP, no partnership is ever going to be only about one thing, and from the start of our relationship my husband and I used to use 'adult' movies both before, and during, sex. I am not willing to say here why I got myself into that situation - thinking about it, I don't know if I even know the answer to that one - but suffice to say, after many years I could not put up with it any longer, and talked to my husband about it. We never managed to have sex together again after that talk.
It must be at least 10 years since we last had sex. When he tried doing it without the porn, he either couldn't get an erection at all, or he couldn't keep the erection long enough to do anything with it. So of course, I completely lost any feelings that I had left of me being even a little bit attractive. He then preceeded to lie to me time and time again. He used excuses about his age, or health etc as reasons why he couldn't get an erection. Sadly it wasn't until I came onto Mumsnet that I realised one of the big reasons why he couldn't get an erection with me anymore, which is of course that he is addicted to sex in the form of watching porn.
About 5 years ago I accidently found out that he was still accessing porn, but on his phone now. I couldn't bring myself to tell him what I had seen, and that I therefore knew that he can still get an erection and 'have a wank' when he uses porn. He has continued to lie to me about it for many years. But although it has been a long time now since I went through the menopause, I still miss both the sexual side of having sex, and the other feelings of intimacy that should accompany the act of two people making love.
So I really hope that you don't end up like me @InSearchOfSmth87, but only you know about the rest of your relationship with your partner, and whether you want, or are even able to, split up from your him. I do think that him continuing to contact sex workers is because that is the that way your partner is addicted to sex, and that it is the only easy way for him to be able to hold on to an erection, and then have an orgasm. Good luck with making the right decision for you OP.