Are you saying horny people wouldn’t fuck because porn exists? It’s a masturbatory aid, not masturbation itself. I cannot for the life of me think of an occasion where it would affect reproduction.

“I’m not going to go out tonight, guys. I’m going to watch porn instead.”

“I as a 16 year old would rather watch porn than get laid”

"I know we’re really hitting it off and it seems like we’re going to bang but I’d rather go whack off to a few videos on the internet "

Your comparison is more like hotdog vs a fork.