Pornographic gay movies films are typically categorized as either softcore or hardcore pornography. Irrespective of the legal or social view of pornography, it has been used in a number of contexts. Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses . John Stagliano is considered to have started the gonzo pornography hentai porn genre with his Buttman series of films. Target audience are teenage / young adult women. A celebrity can fight the release in court to maintain deniability momporn while still enjoying the career benefits. Men may also rub or massage the glans, the rim of the glans, and the frenular delta. What seems clear from the historical record is that much of the lesbian material in pornographic texts was intended for a male readership. Bondage pornography specializes in the depiction of sexual bondage or BDSM activities as photographs, stories, movies, or drawings. Mutual masturbation, mutual manual stimulation of the genitals between partners, can be a substitute for sexual penetration. In general, BDSM play is usually structured such that it is possible for the consenting partner to withdraw his or her consent during a scene; for example, by using a safeword that was agreed on in advance. Content featuring male bisexuality has been a growing trend since the advent of internet pornography. Group sex most commonly takes place in a private sex party or semi-public swinger gathering, but may also take place at massage parlors or brothels or, in some jurisdictions, at purpose-built locations such as sex clubs. Works in this genre may be considered adult for any number of reasons. Lolita pornography features women who are 18 years old or slightly older, who pretend to be underage teen girls. 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. The term pearl necklace is used by some because the drops of semen deposited by the man resemble a necklace of translucent white pearls.