I don’t like my BF adding random females on social media

I honestly cannot seem to be okay with my BF adding random females on Facebook or Instagram or Snapchat. I don’t understand the purpose for it or the reason behind it. If you don’t know them why add them at all? Look at their pictures and keep going about your day why add her? I feel like it gives off the wrong impression even if that isn’t what he’s intending. He also does music so he adds people to help share his music make and females but females share music more apparently. I just can’t wrap my head around it or be a hundred percent okay with it. Like on IG they can follow you but you don’t have to follow back. Or adding the same female on multiple social media accounts. I know he isn’t cheating on me but this just bugs the hell out of me. Any suggestions?!