Probably, ColourBars... but I think a lot of people have so much trouble finding it that it's hard to say.

I have heard the theory that a woman's G-spot is really a nerve or something connected to the clitoris anyway, just hitting it internally rather than externally. I don't know if that's true. If it is, it might be that differences between women's anatomy might mean that this nerve is more accessable to some women than to others.

Bear in mind though Melissa... it's possible that this whole G-Spot idea is intensified by the urges and result of sexual attraction, so non-asexual women might have a better chance of locating or intensifying that stimulation. As for tightness etc... probably same again that non-asexual women might be more able to relax and lubricate as a result of that mental process as well. As I understand it, a woman is tight as a virgin and sex is uncomfortable the first few times (I guess that goes for anything you care to shove up there) until her body starts to adjust and get used to it, so probably with some practice and care you could change things.