should i care that my boyfriend likes girls bikini pictures on instagram?

i never thought of myself as a jealous girlfriend but i've realized recently that my boyfriend likes a ton of girls' photos on instagram. not like instagram models or celebrities, actual girls that he knows in real life. i obviously won't show the pictures here, but a lot of them are very pretty girls with amazing bodies wearing pretty much no clothing (skimpy bikinis, etc). i've never mentioned anything to him about it because i don't know how i'd go about doing so without seeming crazy or controlling, because a lot of the time i'll see either by looking through my explore page or looking through the girls he follows. there are some super pretty girls with public profiles and he likes every single one of their photos, even if they're bikini pics or whatever. he never comments or anything to my knowledge. should i care about this? it stung to see and i almost feel like it's a little disrespectful but i also don't feel like i really have the right to bring it up.. :/