Should I be mad that my boyfriend likes porn star s pictures on instagram?

Communication is key, you need to explain how you're feeling to your boyfriend and see if you guys can meet a happy medium that you're both comfortable with. Wether or not you should or should not be mad is a personal thing, if it makes you uncomfortable, it make you uncomfortable.

hm no, perhaps if you (and its not your fault) took time to know your boyfriend you could have foreseen this and then not gone with him.

I know a guy who does this and has a girlfriend and i think he is a nice and sentimental guy, but it would upset me too. I don't think you can really do anything either, and just notice if you feel good around him (i.e are you getting fun or support or what you need from your partner, regardless of this annoying trait) lol good luck

You don't give any context.

Me and my girl enjoy Porn on the internet but we don't rate it. I like some girls she likes others.

When it comes to Instagram and looking at pictures is he just saying to you 'She is pretty' or is he in front of you 'liking' them on the internet?

Wow if you get upset if your boyfriend likes porn, I wouldn't be booking any long term living arrangements

"Should" you? Or are you? It seems disrespectful.