The Zucker study is interesting, but...
It measures arousability through questions and pictures. It doesn't measure whether something actually feels good when used. For instance, had they asked me (they wouldn't have as I am not heterosexual), I likely would've scored high myself because I find lots of things arousing. Not having a clitoris has let me really tap into the part of my brain that controls arousability and I've learned to compensate in very good ways despite having my clitoris stolen from me.
If you are interested in Zucker's work, he's excellent about sharing it and you can write him and he'll send you a copy of it or any of his other work.
