I would not like to talk about it over Skype, but thanks for the offer. Actually, I don't have Skype. It's very sad.
Anyway, yes, I know that sexual pleasure is why people watch porn, but you can't deny that it is exploitation. And I get what you are saying about reproduction, but even though we're part of the animal kingdom, we don't think like other animals. There are some very intelligent animals, but, to date, we are the only species who are advanced enough to not live for the sole purpose of continuing our species. Therefore, although from a biological standpoint, we are only good for sex, from a moral standpoint (which, since our discussion is about why porn is wrong, that's where we are) that's not the purpose of our existence.