I admit I cringe at my behavior, but I can't stop it. it seems to be beyond my powers. I'm more of a introvert girl, shy, but not socially isolated or desperate. I have a very annoying problem. I keep developing crushes, not on the guys that are close to me, but complete strangers

There is this boy who comes every couple of weeks in this shopping center I work in, and I don't know nothing about him, he just caught my eye a year ago and I can't stop fantasizing how would it be with him. All good, right? The problem is that I keep imagining him being a HVM without even knowing a single thing about him.

Is this just lust based on his looks? because he doesn't look like a typical fuckboy, I know he doesn't have abs or a hot body, he's not muscular, but skinny, rocker-skater guy who looks mid 20ish. Yet I can't stop being infatuated with him, picturing the two of us dating.

Are my fantasies a product of sexual attraction? I'm so confused, is this even normal (im in my 20s)?