Are you aware of women pushing out watermelon sized goblins through that orifice? It's part of the design :P
I think what was meant, is that dildos that long would normally reach a woman's cervix. Possibly that would not be a pleasant experience.
I’m more talking about the depth. Where does it all go???
I did some reading after and yeah basically you have to train and stretch the interior of the vagina over time. Pretty interesting.