Fiancée liking half naked models on Facebook

So I was looking through the pictures my fiancée has liked and I saw that he liked a lot of half naked models on Facebook. He knew I don’t like this or like him watching porn so why do it? Why do guys have to make their women feel like shit? If you’re in a relationship you don’t need to be liking pictures of other women or vice versa. To me it’s cheating emotionally. Now we’re not speaking to each other and I’m trying to get over it but I can’t. Just a rant post mainly. 💁🏻‍♀️ and don’t say it’s a guy thing because that’s a load of crap. I don’t care if it’s girls he doesn’t know, it still shouldn’t be done.