I definitely should not be writing this when I'm well exhausted and thus my crankitude rating is not at optimal levels for Not Making Offensive Generalisations. But I'm going to because fukkit.
If you're in the company of someone you don't know, and you're attracted to this person, you're probably going to try and make that known to them. Yes? Well, some of you are very shy, so maybe not, but for those of you that do-
Bear in mind that liking someone does not mean they owe you shit.
If you take a chance, bear in mind that you may be rebuffed.
If you are rebuffed, bear in mind that hey, it isn't necessarily personal, they may simply not be that into you.
If you have done all this and the outcome has been delivered, well done. You have courage and take risks with yourself. Probably not the outcome you were after, but what the hey, you tried.
If you do all this, the other person has pointedly said no and that this makes them uncomfortable and you then continue to exhibit this behaviour you are now being a jerk.
The boundaries have been drawn. If you don't then respect them, you are being a sleaze, and yes, that is sexual harassment.
That first rebuff? It's reasonable you get that for free. When people don't know each other, you don't know where the lines are until you test them. When you know where they are, there are no excuses. You're being pushy.
And that second rebuff? That isn't free. That is when I start actively disliking you.
Arguing about it won't help your case.
This applies to men and women, hetero and homo, and I have been guilty of it myself, albeit my experience has only ever been with straight guys who don't understand that I don't owe them shit.
Expectations are your death knell.
You can be attracted to someone as much as you like, but they will never owe you shit.
(This certainly isn't as articulate as I'd like, but I think you get the gist.)