What causes exclusive male homosexuality? This is the question I’ve addressed in the last few posts. The answer is still elusive although there seems to be consensus on some points. One such point is the relative importance of inborn causation versus environmental causation. In men, an exclusively homosexual orientation has a heritability of 30-45%. A... Read More

One point is often raised about male homosexuality: it has always been with us. True, but has it ever changed in its nature or prevalence? Well, more gays have been ‘coming out of the closet.’ People are practicing openly what used to be done in secret. But have there also been more fundamental changes? Such... Read More