Why are conventionally attractive people scary to me?

I’m not sure this is the right community for this, so if there’s a better one please do let me know.

Maybe this is something only I experience, but why do I find conventionally or objectively attractive people strange and uncanny to look at? I find them somewhat off-putting, like there’s something about them that just doesn’t fit. This could very well be attributed to plastic surgery and whatnot, but aside from people who have had almost 90% of their bodies altered, I still find people who look good according to a certain standard very odd to look at.

As an example, I’ve never liked a celebrity (be it a musician or actor/actress) and generally have no desire to meet one in real life- I may still like how they portray characters or the music they make but I won’t want to look at them. On the other hand, I could very well spend hours people watching and find them wildly interesting and not odd to look at.

Maybe this is just a really weird thing, and maybe could be called discriminatory in its own right, but does anyone have an explanation for this (preferably with sources, but it isn’t required)?