Let's call a thing a thing--beuatiful women aren't just "intimidating" they're downright scary to the average man. Even in relationships, a beautiful woman can bring a strong man to his knees. But, obviously, this is not physical strength, so what is it that make beautiful women so powerful?
She Has Something the Average Man "Doesn't"
The average male feels concrectly that a beautiful woman has something he doesn't. He's not "hot" certaintly not as hot as her and while they understand logically that this doesn't matter, emotionally it feels as though he's coming to her with an empty cup while her cup is full. It feels uneven, unbalanced, and logically its hard to fathom why she would want him when she has so much "more" of what he values.
She's The Unknown
Fear of beautiful women is just that a fear--it is larger than a logical disposition to avoid that which might cause you harm, it's irrational, built up by the mind's ability to imagine consequences. It isn't until an average guy just tries it with the full expectation of painful failure that he realizes that not only is there little to be afraid of in failure, he actually doesn't fail nearly as much as he thought he would.
She's Not Usually the Most "Supportive"
porn has changed for this generation of young men. no longer are the majority of porn videos consisting of actual augmented porn stars. Now many many many videos are "amateur" videos that one might imagine a couple making together that somehow leaked online. This, i believe, is a result of young male's desire to sexualize the women around them--their friends, peers, coworkers and porn creators desire to capitalize on this while managing to only have to produce intentionally cheap videos with poor camera work to add to the illusion that "this could happen all the time in real life."
Of course, this means that just walking into a starbucks coffee shop, a young man might find himself stimulated by many women around him as if they are porn stars, which is obviously a frightening experience for an inexperienced average male.
Average Women Exist
Fears are usually only overcome when there's no longer a choice. Adrenaline kicks in over fear and sends you into action, but because there's just as if not more women who are not who he defines as beautiful he has little reason to "try." generally, this will cause him to treat the average looking women as replaceable, and even an annoyance, but not always, if his intention is to "settle."