Robot Totty must:
a) Look like the real thing (or not, if you want to go All Soryama, All Night).
2) Do whatever one wants behind closed doors enthusiastically instead of screaming and throwing kitchen implements one's way whenever one says "how about a fashion show?"
#) Not phone anyone afterward to "tell all".
Once those Three Laws of Robot Crumpet are in play we can safely move human partners to where they want to be: raising kids (or not) and focusing on work (or not). Whatever, other human beings will not be needed for quick, fun, naughty/kinky sex and neither will they need bribing with dinner and flowers for "undergoing" same.
I see no downside, and I'll take the Cherry 2000.