The reason why a person's sexual love remains after death is that a male remains a male and a female remains a female, and the male's masculinity pervades the whole and every part of him, and likewise a female's femininity; and the impulse to be joined is present in every detail down to the smallest. Since that impulse to be joined was implanted from creation and is therefore continually present, it follows that the one desires the other and longs to be joined to the other. Love taken by itself is nothing but a desire and hence an impulse to be joined; conjugial love is an impulse to be joined into one. For the male and the female of the human species are so created as to be able to become like a single individual, that is, one flesh; and when united, then they are, taken together, the full expression of humanity. If not so joined, they are two, each being as it were a divided person or half a person. Since that impulse to be joined lies deeply hidden in every part of both male and female, and every part has the ability and desire to be joined into one, it follows that people retain mutual and reciprocal sexual love after death.