What do you think about me getting a girl to like me then turn her down?
How do you plan on engaging the girl's interest?
I would have sex with her and then turn her down
You shouldn't coerce people into liking you and using them. It's cruel to manipulate people. People won't want to associate with you if you're manipulative.
It's just a tease, it's harmless to play around with others.
It's not harmless when the other person gets hurt. How would you like it if someone manipulated you?