Idle questions

I've just been reading a bunch of abortion and dentists with Freudian syringes related posts around and about the internet, and my mind started wandering (as it often does when I'm bored at work), and I started wondering: Who do my eggs belong to? Does a man own his sperm? If I consent to sex, and I'm using birth control that fails, have I actually consented to allow my sex partners sperm to engage with my egg? If a man uses a condom and there is a hole in it unbeknownst to him, has he really consented to putting his sperm into someone else's body?