“Males do not represent two discrete populations; heterosexual and homosexual. The world is not to be divided into sheep and goats, and not all things are black nor all things white. It is a fundamental of taxonomy that nature rarely deals with discrete categories. Only the human mind invents categories and tries to force facts into separated pigeon-holes. The living world is a continuum in each and every one of its aspects. The sooner we learn this concerning human sexual behaviour, the sooner we shall reach a sound understanding of the realities of sex.”