To be fair, it's not just the men nowadays - a growing number of women also have a warped perception of what men are supposed to be like in the bedroom because of porn. I know that there aren't any studies out there but I'd say that porn has ruined many kids because they get exposed to it from they are 7-8 when they haven't remotely developed enough maturity to know the difference between fantasy and reality.
I see it all the time on social media sites such as Reddit and others where teens or young adults talk about being exposed to some porn ad at a very vulnerable age and they became hooked. The worst part is, these ads are everywhere. It's why a few young ladies claim that they have a rape fantasy but when they actually raped by a stranger and have to face the consequences, it traumatizes them for life. If it were up to me, the porn industry would get order 66.