Bf liking others girls pics

Like I don't have a problem with him liking girls pictures, cuz most of the girls he follows are his friends from high school but I dont like when he likes their bikini pics or sexy pics it just makes me uncomfortable. There was a pic he like of our mutual friend and it was a pic from her stomach down in just her underwear and that made me uncomfortable. I haven't talk to him about it but am I being over dramatic? I know is just a picture but it would be different if it was a selfie or something not a pics of girls in their underwear or bikinis or sexy ones. Or when a meme page post a pic of a girls with her ass in it he says "that ass though". I'm not a jealous type but it makes me uncomfortable

Should I talk to him about it?