Speaking as a man (which is the only way I convincingly can), it's also a gigantic turn-on (at least, for some of us) to watch a woman take something large or otherwise unusual. Primarily it's the novelty of it--while most of us never tire of seeing our own cock in your pussy, seeing a hefty vegetable or a giant dildo or a wine bottle in there is an instant stiffener. And of course, if it's our hand then there's also the pleasure of the tactile turn-on combined with the visual. If, as with some women, that extra filling makes you cum harder and crave our cock all the more, that's better still.
I tend to agree. There's a porn site that deals exclusively with giant dildos and I've enjoyed seeing some of their stuff. I'm not sure just what the appeal is other than how fascinating it must be as a woman to be able to accept such a large object in you. I suppose men have the idea (perhaps erroneous) that the bigger the object in your pussy, the more satisfying it is. I'm not sure that's true, but it is a male myth. It's probably why we are also fascinated by dubble penetrations and such. I've always loved lady friends that had such fantasies....... a couple of them also had the experience.
