Having something done to yourself VS doing something to other people, there's really no comparison here

Heh. It's interesting how you assume the real crux of the issue away.

The real crux (IMHO, of course) is whether and when a fetus stops being a chunk of tissue and begins to be a human being. There are two endpoint views -- at birth and at conception -- and a variety of intermediate positions.

Your post assumes that the fetus is a chunk of tissue so when you are doing something, it's to yourself, not to another person. But that assumption is precisely the root of the disagreement.