A note on vaginas: Cervices (AKA, The End of the vaginal canal) move. A lot. Some parts of my cycle, my cervix is only a couple inches in, if that. Around ovulation, I have to try really, really hard to reach it and sometimes can't (and I have long fingers). When they get bumped they tend to retreat up, and during arousal it's the same. So the depth of a woman's vagina isn't a constant. Same goes for width. From some angles/positions there is a lot more room than others.
Which means that you can love a big penis (or hand or dildo) sometimes, and other times prefer something smaller, even in the realm of PIV (which is far, far, far from the be all end all of sex).
So in search of love and laughter, I'll be travelling 'cross this land,
Never sure of where I'm going, for I haven't any plan.
And in time when you are ready, come and join me, take my hand
And together we'll share life out on the loose.
Dancing about Architecture: A Journey into Polyamory