OP he was horrible to you.
He said
'When I asked him why he said that it's something to do when he is bored and he doesn't get to see my naked as I don't like to get dressed in front of him as I feel embarrassed about my body.'
He put the blame on you and he lied about what he was looking at.
That is shit.
You don't think people in relationships should wank?
You seem to have views that are very unusual.
Do you know where they came from? Upbringing in a strict religion or similar? Bad experiences?
Something to think about, you don't have to say obv!
Thinking that people in relationships should not look at other people (well that's half the film industry stuffed!) or masturbate are really unusual views.
I think maybe talking to someone in real life about your unrealistic views about relationships would be really helpful.
I also think your OH was really horrible.
What he said was aimed at protecting himself and using something that is really a big issue for you to do it. And he's obviously lying.
I don't have much time personally for therapy but I think couples therapy might in your case be a really good thing to do.