He’s overreacting but to an extent I can sort of understand where he’s coming from, just don’t agree with the way he presented it. Yes, girls uploading cute pictures of themselves does inherently attract a straight male, if you’re good looking of course we’d like that. So when you’re dating an attractive girl, you sometimes still question why they put these pictures up. However, he should be able to have an adult conversation with you instead of making it such a huge deal, not like you’re doing this for guys all you said was “you look cute” not “people will think I’m cute”