Hi!
Best thing is to look at the Chinese marketing -
http://www.best-sexdoll.eu/Sexpuppe/sexpuppe.php
and those reasons are probably why all of us sensible men own simulacrums of some sort. We are all healthy males with functioning equipment who want it to stay that way without anyone else being damaged by our delight in sensual pleasure.
As I assume you're male, why not buy a gal yourself at the inflatable end of the market, of course just as a photographer's model and nothing more :-) and then you'll become better acquainted with the sort of ladies who think of nothing else but sex all the time they're looking at you.
http://www.ebay.co.uk/itm/200901481129 is a reliable source and offers are accepted.
They can be great characters, frightening the wits out of people not expecting them at a window, but don't expect them to do the ironing nor make music.
Best wishes
Harem