Don't be nice to girls. Ever. Girls hate nice guys, so treat them bad with regularity. Ignore them, berate them, make jokes about them, tell them they're fat, beat one up now and then for practice, steal their money, boot the out of your car in the middle of nowhere, never buy them a drink, attempt to pimp them out, whatever, then when you are ready to settle down be nice to one of their hot friends they will think they are special because you beat all your other girls up, and bam you found your girl for life.