The book covers many interesting subjects like why we have sex for fun, why women have breasts when they are not feeding babies, why we have become monogamist (had always thought it was due to Religion but Jared explains how it benefits us through evolution).
He did also explained why women have adapted not to go on heat and hide the time when they are most fertile. It also has an interesting discussion on menopause and why it exists in humans.
All in all a very interesting book to read.