Not to sound judgmental at all, but why would you want to attempt to pleasure something that has no sensation and can not react, respond, or enjoy your attentions?
(In response to the doll having supple and realistic labia for licking)
Is this along the same lines as sucking on a dildo or vibe in that preforming sex acts designed to give pleasure on inanimate objects that can not experience sensation at all brings some people excitement?
My apologies, but I have never understood that, having not experienced it myself, and I strive to understand the idea behind it, and where the joy comes from in that type of act.
The doll sounds nice though. In all other respects, I could see a quality bisexual/lesbian doll being a really popular item. It's definitely an under-tapped market, that's for sure.