I wouldnt dare to try, but i have been told how painful pap smears can be and that many women need painkillers to endure it at all. I cant imagine how painful it would be to stretch it open. And thats also why there is such a thing as too long.
It's like hitting a wall and having the woman say "that hurts, please be more gentle" (hitting the cervix, entering it isn't going to happen, penises aren't that rigid or sharp)
I recommend against positions that maximize penetration depth with women with shallower vaginas
Nearly every website will tell you that it is impossible, that the cervical entry is the size of a thumb.
None of them even consider that during birth the cervix dilates significantly larger than any non-surgically altered human penis, and none of them mention the flexibility the cervix keeps after natural child birth.
Here's an article that cites some doctors that aren't fooled by generalizations:
The real source, the one that is useless to you unfortunately, is what that woman did to me. She told me it was going to happen, I thought I was prepared. I WAS NOT.
Find you a woman who knows how to use her cervix and it will CHANGE YOUR LIFE
Can someone explain what the hell is going on with the liljunex's body? She does extreme dildos of absolutely wild proportions and there is a specific "pop" moment where she can get significant new depth.
The exaggerations allowed by 2D/3D art is what makes it more enjoyable. I think the most unrealistic thing I see in hentai is a dude who can manage to bang a full harem, nonstop, for 24h or more.
There's some actual porn, where that happens, but it's a real rarity. Even rarer, than the urethral penetration, which is already rare due to the small hole need to be expanded greatly, and likely will cause incontinence, infections, etc.