Thread ended back here, guys.
Reminds me of some dudes thinking Asian women all have tight pussies, or black women have loose pussies. Yes, I've seen both of those posted on these forums. There was even some horribly racist guy who used to go to every thread on the topic and post "data" he had "collected" about it who I think finally got banned. Ugh.
I can't speak for you, but I like for people to ask these questions and challenge what they believe to be true, and to do so rationally. There's nothing wrong at all with asking questions that make people uncomfortable, but the important part is understanding how to be logical in our approach to answering these questions.
I tend to find tall women very attractive, but if I said 'I haven't noticed a correlation', then in response someone posted properly gathered data showing that there's a major correlation between height and vagina depth that would persuade me. Unless a pussy's way too tight I put vaginal size so far down on my list of attractive qualities it doesn't really even register, but correlations are still neat when we find them.
The racial stereotypes are another interesting thing to look at, but just saying they're untrue because you don't want to be 'racist' is illogical too. The most frequent kind of thread on this is the 'black guys have bigger dicks' ones that pop up where everyone just goes back and forth saying 'yeah I met a black guy with a huge one so it's true' to others saying 'I saw a black guy with a small penis'. This is not conclusive of anything, and when people think this way our natural observer effect (where our preconceived notions influence how we observe events) just takes over to cement us in believing what we already think is true. If there were good data showing black guys have big dicks then I'd believe it even though some people don't like to hear that, but the data just aren't there.
So going back to tall girls, the observer effect can play a role for some people. If you want to believe that tall girls have deep vaginas, then you'll remember any taller girl who's deeper and think it validates your belief. For anyone who doesn't (or short girls who can take it deeper) your mind just rejects as an outlier. I think it's fortunate that most of women's genitalia are on the inside or obsessive men would constantly be measuring them. Since it's mostly hidden, we only really notice how good someone feels, which imho is what one ought to be noticing the most during sex.