You were the famous Lex Luthor, brilliant billionaire and inventor extraordinaire. You were Superman's arch enemy and were often seen as just an awful guy in general.
But the truth was... You were scared; absolutely terrified that these beings of higher power would control the planet that once belonged to humans. That humans like all native people usually do end up being oppressed.
The fear you often felt made you act out in irrational ways, made you appear to not like aliens. You didn't hate them, you just... were scared to let them in..scared to be close with people who could kill you with one punch.
And the worst thing was, for some reason whenever you saw Superman your heart would beat faster and your insides would feel like mush. And you were sure he could tell that your heart was beating faster considering the numerous concerned looks he would give you.
Your cheeks would grow hot and you just become a timid stuttering mess. It was getting quite embarrassing.
"Lex, are you okay? Your heart is beating really fast-" Superman's polite and concerned voice called out.
God- why was a man so strong so hot..
No! Stop Lex! Your not supposed to think like that; oh but you couldn't help it... Boy scout was just so very handsome-
And dare you say.. You were a masochist; perhaps Superman might be a better fit than you originally thought. Or he might just get really concerned for you and human kind- eh it would be fun either way. It was a 50/50 at best and it was one gamble you were willing to take.
Besides it would be funny to see Superman freak out that such a weak species would actually want to be hurt.
And maybe your human instincts would scare him too; if humans like you get too scared you usually rock back and forth to calm yourself. That would probably confuse and concern him at the same time; oh well, there was only one way to really find out.