Interesting at first then I skipped through. A chunk of the population - gay people - are not mentioned at all, so I lost interest. I gather that it is a difficult issue for hetero people when they believe that sexual attraction is only about having children. I suppose no one has done much research into why there is same sex attraction. I think that is why I study astrology; it really does give answers into why people (regardless of gender) are attracted to each other, or not.