I feel awkward walking directly behind a sloot

If I’m walking directly behind a sloot, particularly if she has a nice a**, I start to feel awkward. I feel like I’m following her, or I start to worry that she or people around think I’m looking at her butt. (sometimes I am)

Also, if a girl with a big butt is standing directly in front of me while I’m using my phone, say in a line, I get paranoid that she or other people will think I’m recording her to fap to later.