Boyfriend is a creep on Facebook?

My boyfriend likes so many girls photos on Facebook. Pictures of them just smiling which isn't bad at all. But then he also likes the pictures that they put up in little suspenders and a bra or a pic of them posing sexy in bikinis. Like he likes around 3-5 girls photos a day. It just always comes up on my newsfeed. And he likes photos of girls that they added months ago which looks like he went and creeped all their profile pictures. He liked 10 pictures in a row of this girls profile pictures. I don't know why this bothers me. It just makes me question if he's messaging them after. I like the occasional guys photo, but not like that many. Just find it annoying to go on Facebook now. And I don't want to talk to him about it. But is this like normal for boyfriends?
Boyfriend is a creep on Facebook?
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