That's not true. Pornography is an extension of the self, just as our words here are an extension of ourselves. Pornography is simply lewd or perverse conduct displayed through a medium.
Would it make much difference to you whether you were stripped in a public square or if photos of your naked body were displayed in the public square?
Presuming we are speaking of pornography that displays consenting adults, I see nothing lewd or perverse in sex.
Why do you?