This cosmic Eros, who in Orphic cosmogony sprang from the world-egg which Chronos, or Time, laid in the bosom of Chaos, and which is the origin of all created beings, degenerated in later mythology into the capricious god of sexual passion, the son of Aphrodite and Zeus, Ares or Hermes.
Whatever may be the true explanation of stridulating organs in adult beetles, sexual selection can have had nothing to do with the presence of these highly-developed larval structures.
Hence the strictest asceticism (abstinence from flesh, and wine, and sexual intercourse) is demanded, as well as the knowledge of God.
The old criterion by which they and other Metazoa were once distinguished from Protozoa, namely, the differentiation of large and small sexual cells from each other and from the remaining cells of the body, has been broken down by the discovery of numerous cases of such differentiation among Protozoa.
In some Lamellibranchs - for instance, the European Oyster and the Pisidium pusillum - the sexes are united in the same individual; but here, as in most hermaphrodite animals, the two sexual elements are not ripe in the same individual at the same moment.
Here the asexual cells are borne upon the so-called Aglaozonia reptans and the sexual cells upon the plants known as Cutleria.
In some other cases medusoid develops directly from medusoid (hypogenesis), whether by sexual cells or by gemmation.
We know very little of the details of reduction in the lower plants, but it probably occurs at some stage in the life history of all plants in which sexual nuclear fusion takes place.
Linnaeus took up the subject in the inauguration of his sexual system.
As to the question of sexual virtue and morality in Japan, grounds for a conclusive verdict are hard to find.