That, and, let's face it, if a person learns about sex from porn, they might have a really hideous view of sex.

Depending on the porn. Remind me to one day tell you the story of how Martial (the Roman poet) taught me how to give blow jobs. He was an excellent instructor despite being dead for two millennia.

I think there can be a situation where both sides have clear and powerful arguments but in the end one can be decided upon as closer to the truth than the other.