anybody know the book about a story of woman impersonating a man

[jman0]

Trying to keep the subject line reasonable.
I'm hoping someone here can help.
There was (there IS I swear!) a book written by this lesbian whom is a shrink, iirc.
In which she impersonates life as a man, including wearing facial hair and a fake "member", in order to gain trust and insight into men.
She apparently gained some notoriety for it, and did a circuit of interviews (both radio and TV) probably 4-5 years ago.
I haven't the faintest idea of the book title.
And Google hasn't worked it's magic for me.