Donkey of Asiatic wild ass or onager, "Equus hemionus", and three subspecies of the kiang, "Equus kiang", of the Himalayan upland. A male donkey (jack) can be crossed with a female horse to produce a mule. A male horse can be crossed with a female donkey to produce a hinny. Horse-donkey hybrids are almost always sterile because horses have 64 chromosomes whereas donkeys have 62, producing offspring with 63 chromosomes. Mules are much more common than hinnies. This is believed to be caused by two factors, the first being proven in cat hybrids, that when the chromosome count of the male
Clothed female, naked male exchange where the more traditionally dominant male is objectified, debased, or humiliated by a more traditionally submissive female. As a result, CFNM fiction frequently includes the clothed female taking on the role of a dominatrix over the nude male. The opposite of CFNM is clothed male, naked female (CMNF). In classical antiquity, the portrayal of nude male form in art (including the exposure of genitals) was considered to be more acceptable than that of the naked female form. By the renaissance, this view had reversed. For example, in Titian's "treatment of Perseus and Andromeda" in the mid-1550s, it is Andromeda