Aside from the previous comment, which I hope to hell is meant satirically, I'm tempted to say "Any of the Above." Truth is, pain, on me, is probably the single biggest turn on,. but so many other things work so well that it is hard (pun partially intended) to specify.
I love a woman in black stockings, sexy high heels and a snug fishnet shirt. The best part for me is pulling down the black panties and watching a lovely woman step out of them.
A submissive asian contortionist <5'0" and <90 lbs, who would be my fuck doll. If she is also an NCAA/Olympic athlete recognisable from Sports Illustrated—that would be better.
Wait—Maybe twins: I'd testrain one,then make the other one "do" her with me. . .then I'd take turns with both of them.
Straps and roaps would be involved. There should be a sybian in there somewhere too and maybe one of those spark igniters for a gas stove.