A guy is attracted to a woman. He would like to have sex with her. So he asks her "Hey, I think you're hot. Would you like to have sex some time." She's not interested, so she just says "no thanks". And he replies "Alright, no problem!" And then doesn't bring it up again.

What is so wrong with this scenario? I completely do not understand what would be wrong about it? More likely, said woman would be creeped out and demonize him for that. She may even report him to whoever runs the place they're in and get him kicked out. I do not understand what is wrong with what said guy did in this scenario. What's so wrong about directly asking?

And to answer the anticipated objection: Yes, I'd be just as fine with this if a man asked another man for the same thing.