Poor comparison. Abortion is a violation of the rights of someone else (the fetus/baby). Smoking marijuana/doing whatever drugs only harms the drug user. If you're a Christian, then you hopefully believe that you personally own your body, in a partnership with G-d. The only other alternative is that you believe the state owns your body, not in partnership with you.
Hey don't complain to me, complain to the LP, they are the ones silent about abortion.
I'm a Christian, and I do not believe that I personally own my body in a partnership with G-d; I believe that He appointed me acting manager.