Besides the horror of incest, there is another feeling to which reference may here be made. “L’amour,” says Bernardin de Saint-Pierre, “ ... ne résulte que des contrastes; et plus ils sont grands, plus il a d’énergie. C’est ce que je pourrois prouver par mille traits d’histoire.... L’influence des contrastes en amour est si certaine, qu’en voyant l’amant on peut faire le portrait de l’objet aimé sans l’avoir vu, pourvu qu’on sache seulement qu’il est affecté d’une forte passion.”[2055] Schopenhauer likewise observes that every person requires from the individual of the opposite sex a one-sidedness which is the opposite of his or her own. The most manly man will seek the most womanly woman, and _vice versa_. Weak or little men have a decided inclination for strong or big women, and strong or big women for weak or little men. Blondes prefer dark persons, or brunettes; snub-nosed persons, hook-nosed; persons with excessively slim, long bodies and limbs, those who are stumpy and short; and so on.[2056] A similar view is held by M. Prosper Lucas, Mr. Alexander Walker, Professor Mantegazza, Mr. Grant Allen, and other writers.[2057] “In the love of the sexes,” says Professor Bain, “the charm of disparity goes beyond the standing differences of sex; as in contrasts of complexion, and of stature.”[2058] Some writers have suggested that love thus excited by differences is favourable to fecundity, those marriages in which it exists being more prolific than others.[2059] Thus Mr. Andrew Knight, a most experienced breeder, remarks, “I am disposed to think that the most powerful human minds will be found offspring of parents of different hereditary constitutions. I prefer a male of a different colour from the breed of the female, where that can be obtained, and I think that I have seen fine children produced in more than one instance, where one family has been dark and the other fair. I am sure that I have witnessed the bad effects of marriages between two individuals very similar to each other in character and colour, and springing from ancestry of similar character. Such have appeared to me to be like marriages between brothers and sisters.”[2060]