You & Your Hand by Pink, meaning of the song?

The song is basically about a girl who just can’t seem to find a decent guy that she likes. Its all a bunch of “dickheads” and jerks and whatnot. So she’s learned not to depend on any man for anything. She tells any guy that comes up to her

“I’m not here for your entertainment you don’t really want to mess with me tonight just stop and take a second I was fine before you walked into my life cause you know it’s over before it began keep your drink just give me the money it’s just you and your hand tonight”

that she’s not a girl you can have your fun with, and that its better if they leave her alone. Because her life was perfectly fine before men came in and messed it up. She’s telling them that nothing is going to happen and that they shouldn’t try and get her drunk to get into bed with her. So its just going to be them and their hands tonight. Which is a reference to masturbation.