I don't like abortion but I don't see how you can link that to pornography - and like I said I don't even think you can call Playboy 'pornography'.
As a 'social movement' (and that's what you're defending, the scoial movement to accept exploitation of females for sexual display and masturbation) blossoms, the consequences usually manifest in non-dirct line ways. An example is legalizing gambling and the non-direct connection to rising poverty and child abuse and neglect. Another example: Crack addicted females have left their children in the car for hours while 'endulging a person choice'. When the subpreme court passed Roe v Wade, the explosion of abortion (from around 300,000 per year as a high number, to 1.5 million per year) took three years, but the stamp of 'acceptability because it's legal' finally caught on. Prior to 1973 abortion could be performed by any gynecologist when his patient's life was endangered should the pregnancy continue. Look at the stats at the turn of the century, then watch the stats as America went through different upheavals such as the great depression, wars, and 'sexual revolution'. Then apply a bit of common sense rather than seeking to justify behavior you don't want to change.