Should I bring it up? 21M & 23F

I found out my bf (of one year) has been searching up females from around the town & other females that I don’t know of. I’m not sure what it is but, some of these females I went to school with & they have their families. So, is this something that is common? Can anyone else relate? He’s only ever had a serious relationship with me so, I’m just confused about his search bar even when we started dating…. Is that a red flag ?