Real medical shots or videos may violate privacy laws in some countries. Reality pornography is professionally made porn which seeks to emulate the style of amateur pornography. The porn industry and viewing public were shocked by the then-taboo spectacle of a white woman having sex with a black man. In humans, females generally have more round and voluptuous buttocks, caused by estrogen that encourages the body to store fat in the buttocks, hips, and thighs. If dramatic skills are gay black porn not involved, a performer in a porn film may also be called a model. It is used, for example, at fertility clinics to stimulate sperm donors. Once insertion is complete, the fingers are either clenched into a fist or kept straight. Buttocks are sometimes emphasized in pornography, where they are often referred to as booty. Rape pornography features performers simulating rape. Sub-genres can also be classified into the characteristics of the performers or the type of sexual activity on which it concentrates, and not necessarily on the market to which each sub-genre appeals. The naked appearance of actress Demi Moore in the advanced stage of pregnancy on the cover of Vanity Fair magazine in 1991 marked the beginning of a period which has since seen pregnancy presented by celebrities as a glamorous state of living, while also creating a market for photographers to produce images of pregnant mothers, and for fashion stylists to introduce pregnancy styling to their business. Common phrases used to refer to these individuals are chicks with dicks or the derogatory term shemale, although these are generally considered pejorative among transwomen. Evolutionary psychologists suggest that rounded buttocks may have evolved to be desirable trait because they provide a visual indication of the woman youth and fertility. A pornographic work is characterized as hardcore if it has any hardcore content, no matter how small. On May 27, 2010 the television program The Doctors discussed the topic with dozens of teens, parents, and professionals.