Incorrect. Contracts are legally binding and they are enforced and upheld by the law. Think of the contracts professional football players make to their teams. Think of the contracts you make when you rent a house. Those are all legally binding, and you can't back out of them simply because you had a change of heart, without penalties.
So if I make a contract in which I agree to be someone's slave the rest of my life, thats okay? Enforcing that would be a violation of self-ownership. Rightly, I should always own myself, no matter what the circumstances. Thus, if I simply want to walk away and not be a slave anymore, I should be able to. Also, who's the aggressor? Who's initiating force? Surely, since I'm not involved in any implict theft, walking away cannot be considered an aggressive initation of force. However, enforcing the slavery contract is.
Might want to read Rothbard's Ethics of Liberty, page 79, and then chapter 19 starting on page 133.
http://www.mises.org/rothbard/ethics.pdfIf you have entered into a legally binding contract, it doesn't matter if you have second thoughts later, you consented. I consider it no different than people accepting their responsibility for pregnancy. Consider if a man said "I'm ready to have a baby sweethart, have sex with me", she get's pregnant, "Oh I'm sorry honey, I changed my mind". Yeah, I don't think that would fly, and that's not even a real contract.
I don't view pregnancy as an issue of contracts. I added a new paragraph to our pro-life essay that explains it pretty well. Basically, you have to accept personal responsibility for pregnancy not because you made any sort of contract, but because pregnancy is a natural consequence of sex. If you step off a cliff, thats just too bad. If there was some way to reverse it, that would be great, but whether you change your mind or not doesn't really matter. Likewise, with sex, pregnancy is a natural consequence. You don't have to agree to it, its just the way it is. It doesn't matter whether you change your mind, because now you have a human being with rights inside you that you cannot violate.
If you willfully set an irreversable chain of events into motion, then that is your own fault. Tough cookies. Libertarian government isn't there to protect people from their own stupidity or lack of foresight, nor does it exist to step in and ascertain whether or not a person is in the right frame of mind to do whatever he or she wants with his or her own private property (body included).
I guess you are right. However, I still believe that you have a right to change your mind when it comes to contracts which don't involve implicit theft. If I hire someone to kill me, I should be able to change my mind and make him stop. I may have been stupid to consent in the first place, but I stopped consenting. And theres no good reason why the hired killer shouldn't stop. Its not like he has the right to kill me.