Horse breed been produced. Such restrictions have led to legal challenges in the United States, sometime based on state law and sometimes based on antitrust laws. Horses can crossbreed with other equine species to produce hybrids. These hybrid types are not breeds, but they resemble breeds in that crosses between certain horse breeds and other equine species produce characteristic offspring. The most common hybrid is the mule, a cross between a "jack" (male donkey) and a mare. A related hybrid, the hinny, is a cross between a stallion and a jenny (female donkey). Most other hybrids involve the zebra (see Zebroid). With
Clothed female, naked male who is nude—save for the barest wisp of fabric—while Perseus is clothed in armour. Depictions of nudity were acceptable to the 19th-century French salon culture if the setting was clearly "classical", depicting characters in a culture where nudity was commonplace, as in "Combat de coqs" (1847) by Jean-Léon Gérôme. Feminist authors Christina Hoff Sommers and Naomi Wolf have written that women's sexual liberation has led many women to a role reversal, whereby they view men as sex objects, in a manner similar to what they criticize in men's treatment of women. Clothed female, naked male Clothed female, naked male (CFNM),