"I'm curious to find out if your boyfriend or husband does this." (28F, 30M)

My husband is 30 and I’m 28; we got married six months ago after being in a long-distance relationship for five years. He loves me and takes care of everything, but I’ve noticed that on his Instagram and Reddit, he likes posts from celebrities and porn stars. A few times, this made me really upset, and I caused a big scene, which led him to change his passwords so I wouldn't see what he was doing online and react angrily. At first, I thought, "It’s your life; you can do what you want, as long as you’re not cheating." However, now that I can't see his activity when he's out with friends or at work, I find myself having negative thoughts. I'm confident he wouldn't date anyone else or spend money on another girl, but I still feel insecure when I see him engaging with other women online. I just want to know, is this normal behavior for guys? In short, I'm curious whether my husband's actions are inappropriate or if this is typical behavior among committed men.