Reincarnated stories

I find it rlllllyyy disturbing when it's a reincarnation story, and the main character enters a child's body.. and then they start thirsting for a little boy/girl. It's soooo weird Like ur a grown ass person, why tf r u thinking how handsome he is, and even dare blushing??? So disturbing lol

Why do authors love making sht like this?? I don't get ittt