Erotic spankings are commonly combined with other forms of sexual foreplay. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. HIV is among the infections that require such direct contact and is therefore very unlikely to be transmitted via mammary intercourse. Shotacon : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12. They may be noted for using risqué themes, graphic violence, sexuality or black comedy in a manner that is unsuitable for younger audiences. Real school shots or videos which are sexualized may violate privacy laws in some countries. Irrespective of the legal or social view of pornography, it has been used in a number of contexts. The fantasy is typically based around one or more larger beings dominating a smaller being. In the 18th and 19th centuries, some European theologians and physicians described it as heinous, deplorable, and hideous, but during the 20th century, these taboos generally declined. Perhaps following the example set by gay pornography, they have become a popular subgenre within heterosexual pornography since the turn of the century, featuring both vaginal and anal ejaculations. It has since become popular enough with couples to be discussed during an episode of Sex and the City. If one person is penetrated by two objects, it is generically called double penetration . Mutual masturbation, mutual manual stimulation of the genitals between partners, can be a substitute gay movies for sexual penetration. Such grounds and even the definition of pornography have differed in various historical, cultural, porn milf and national contexts. The actual height of the giantess within the fantasy may vary depending on the individual. Creampie pornography features ejaculation inside the hentai sex vagina , mouth or rectum instead of the common cum shot, followed by the visible seeping or dripping of semen from the vagina, mouth or anus. Arcane or occult pornography involves sexualized situations with an occult or magical tone or performers who costume themselves in keeping with the theme, for example, a male performer dressed as a wizard.