Mathematical investigations Book

So maybe it wasn't a book that I picked up on my own from a bookstore. But so what that I had to read it for Anthropological Theory class? I loved it!
This book is education, yes; but at the same time, Lancaster's quirky sense of humor makes it much more fun than your average "I-was-assigned-to-read-this-book-so-shoot-me-now" required reading material. I particularly enjoyed the sections dealing with the "science" of homosexuality. Lancaster makes it clear that he does not "believe in" a "gay gene" or a "gay brain", but rather enculturation processes that may make men more "feminine" and women more "masculine" as described by their cultures.