Boyfriend asks girls he doesnt know personally for their socials

How would you feel knowing your bf asks for girls Instagram so they can follow each other? He does spin classes which is mostly females at the studio that go ,and will then ask for their socials and these are gals who aren’t his friends or who he hangs out with. It bugs me, because I find it weird and wrong ESPECIALLY because he has a girlfriend. Like I go to the gym and workout, but don’t go out of my way to ask guys I don’t know for their social media, to feed my following status/ego all because we happen to share interest in working out? I also don’t need to be gaslit into being told “you’re just insecure” “there’s nothing wrong here” in the comments if you don’t find his behavior inappropriate. I will block you.