Ok, this entire argument seems kind of dumb, but I have to comment here. Pornography and masturbation are two different things. You don't need to watch porn, or even be sexually active, to masturbate. Masturbation is simply the physical stimulation of your genital parts, which doesn't even require hands. In further argument, it is common place for most primates to masturbate, and even children/babies to an extent. Masturbation isn't a taboo act, it is completely natural. Repressing yourself from that seems stupid, but it is your choice, I honestly don't care. But saying that masturbation is similar to going out and smoking pot is ridiculous.
In regard to the actual argument, I would like to mention that pornography does not objectify women. How do I know this? Because of porn that does not include women. The fact that you are talking about women objectification and religion in the same argument is actually hilarious. In the same arguments that have been brought up about porn, why do you think women were objectified far worse before the innovation of porn? Religion has done far more objectification than pornography does, and if you have the audacity to disagree, I would suggest that you read your Bible.