This is just what I was getting at when I said I knew of a way to put into effect this law of ours which permits the sexual act only for its natural purpose, procreation, and forbids not only homosexual relations, in which the human race is deliberately murdered, but also the sowing of seeds on rocks and stone, where it will never take root and mature into a new individual; and we should also have to keep away from any female 'soil' in which we'd be sorry to have the seed develop.