... is that one of the biggest taboos in our first-world societies is that there is a nigh rampant sexual frustration in women.
In that regard I really don't "get" sex dolls.
Honestly, if you absolutely, positively need to f*ck, there is just about an abundance of decent women around who would be glad to indulge.
Women are promiscous - very often even more so than men. The problem is that in our 1st world society women are very keen on not getting a reputation of being a slut. The evolutionary and old-testament concept of the blemished women is deeply rooted in men, which also makes it difficult for men to shed some over-inflated romantic vision of a perfect 10 that f*cks like a porn-star but at the same time for some outworldly unrealistic reason only has eyes "for me". Sort of like the patendly absurd expectations of women vis-a-vis men when it comes to a male mates income and status.
To this day only the strongest and truly independant women have raised being an "ethical slut" to something that is a virtue (those types are rare, gorgeous and a bit scary at the same time :-) ), whilst most women public still speak of sex as a bad thing, even though most women secretly think otherwise. Which is one of the big problems in our society that has decoupled sex from reproduction but outside of 60ies hippie counter-culture hasn't yet quite grasped what that actually means.
But back to the topic: It's not for a lack of decent/usable women that would have sex.
Even simpler yet: The money that buys you such a doll will buy you enough hookers to give you sex you'll never forget your entire life.
The lesson is this: If you're a man that needs to have sex, there are plenty women around who need the same thing, you just have to follow a few basic rules:
1) Don't expect Thandie Newton to stand in line for you if you're an overweight, overworked and underpaid IT guy - go hunting in your own territory and you won't run dry.
2) Don't expect that colleague from accounting that fucked your brains out two weeks ago to look up to you as her future husband and sex-demigod for the rest of your life. If she enjoyed being a pr0n-slut with you, she will enjoy it with others too. You can't have it both ways. Women have desires too. It's that simple.
3) Don't speak too loud of your adventure, if at all. Women can smell a guy that won't protect their reputation from 20 miles away - evolution has made it so.
Good hunting. ;-)