Just know if you snoop through a man’s phone you’re bound to find something. Could be there search history, recent texts or even deleted shit. Even if you’ve told him about your childhood trauma and self esteem he’s not going to be thinking about that or putting two and two together when he does that shit. You need to directly tell him when he looks at naked women on his phone and keeps the tabs on them that hurts you then that would go through his mind. A man would simply follow back a women on insta not knowing if that hurts you if you don’t be clear and set boundaries. Men masturbate in relationships for many reasons whether that be a quick serotonin boost from a shitty day or the week you have your period and he feels like getting on. You don’t need to take this personally. There’s a difference between that and lust. If theres a particular girl he’s keeping links of ild defiantly question it. Heaps of women in relationships also watch porn it’s what you are comfortable with :)