PROG challange: fetish corroborator

write an algorithm that enables two persons over a communication channel to find out which fetishes from a preset list they happen to share.

it should done in such a way that no extra information is leaked, see http://en.wikipedia.org/wiki/Yao%27s_Millionaires%27_Problem to get started.

Bonus: Extra points are awarded to written in Lisp or Scheme.

Deadline: The deadline is 03/07/2015 so get cracking!

Why would you want someone who's into your fetish?
I mean, a masochist doesn't want a masochist, they want a sadist.
A foot fetishist might not want someone to lick their own feet.
A person with an Asian fetish likely isn't Asian, so being stuck with another Asian fetishist would be useless.