<human>: Can you condense the text into a few key points?

I have a feeling I'm overreacting about this, but I wanted to get some other opinions. For the most part my boyfriend is pretty shy, although he does love to hang out with friends and be social sometimes, it just depends on his mood. In high school we were both more flirtatious but as we have grown up and matured neither of us are like that anymore. He does not flirt with other girls (to my knowledge, obviously) but I really believe he doesn't because it's just something he isn't comfortable with socially.

Anyway. Lately on Reddit I've been noticing him commenting on a gaming subreddit. He is a big gamer so that isn't particularly weird but a lot of the comments are on pictures on anime cosplayers naked or close to it. These are not women he knows, but I wouldn't call them "famous" either, more like well known in that community. The girls in the pictures are not the posters, so he isn't commenting to them directly but his comments are always things like "I would let her sit on my face all night" or "any more pictures with her in them? I'm so thirsty right now." For some reason seeing this stuff really bothers me. Should it?
<bot>: Boyfriend comments on pictures of girls saying how sexy they are and what he would do to them, should I be upset?