Just to add my 2 cents, and I'm jumping into this late (so forgive, if I'm off target), but you simply have to have women on a large penis discussion sight, especially one that's called the large penis support group.
If you're a hetero guy youre coming here to show off, ask questions, whatever. But honestly, sometimes you have to go right to the source to get the answers. Asking a bunch of guys how vaginal penetration by a large penis feels, for example, isn't going to get you an answer. Women are the other side of the equation. So to not have women here, would be to only have half the story.
To the question at hand, it's true women can't hide their breasts. My wife has large breasts (which are among the features that attracted me to her), and she gets and has gotten lots of attention (good and bad) around it. Big guys know it can be hard, though not impossible, to hide our endowment, so we should be able to empathize and vice versa.
Also in my experience, some ladies do talk about the size of their guys, especially when they're guys are big. I've heard my wife hinting to friends, but it's not overt or specific. We men tend to be very blunt and specific creatures while women tend to be subtle and clever.
It's all good. I can't speak for everyone, but this is a sight where we post pictures of our naked penises, we must not really mind that much if people (our significant others or whoever are chatting about our endowment).