" The domestic Relations are founded on Marriage, and Marriage is founded upon the natural Reciprocity or intercommunity (commercium) of the Sexes. [This ' usus ' is either natural, by which human beings may reproduce their own kind, or unnatural, which, again, refers either to a person of the same sex or to an animal of another species than man. These transgressions of all Law, as ' crimina carnis contra naturam,' are even 'not to be named;' and as wrongs against all Humanity in the Person they cannot be saved, by any limitation or exception whatever, from entire reprobation.] "

― Immanuel Kant , The Science of Right