Your morals are your morals. Have all the sex you want, but if you get pregnant or knock someone up, I think you should now have that responsibility to deal with. So, yeah...
I've seen this analogy before. The argument could be made that a child is a parasite for all their life.

But seriously, the zygote that is created upon conception is a separate entity, with it's own unique DNA. Women try to claim that they can do what they want with their bodies, yet the child that is forming within them is a completely different person. I believe that because abortion is legal and available, it gives both men and women the ability to forfeit the consequences of their actions.
This is one of the biggest reasons I don't agree with abstinence-only education. Kids are going to have sex. They might as well know how to properly protect themselves from disease and impregnation.