Personally I think its more these people are highly socially alienated and thus are starving for any form of love and affection; and a problematic version of that like with this has extra appeal as it shows guys as the object of desire and pursuit, something that is not the norm in modern society, and can satiate their need to feel wanted and valued intimately by another. I'm pretty socially inept and have had little success romantically, and these kinds of fantasies hold an appeal to me too because I really want someone to desire me.