Lying face down on a comfortable surface such as a mattress or pillow, the penis can be rubbed against it. Normal quantities of gay movies ejaculate range from 1.5 to 5.0 milliliters . A pornographic work is characterized as hardcore if it has any hardcore content, no matter how small. Both sexes sometimes apply lubricating substances to intensify sensation. For circumcised males, on whom the glans is mostly or completely uncovered, this technique creates more direct contact between the hand and the glans. Once insertion is complete, the fingers are either clenched into a fist or kept straight. It is typically animated pornography, as the legal age to be featured in a pornographic film in Japan is 18. Group sex most commonly takes place in a private hentai sex 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. Pornography in Japan is large and intertwined business of adult entertainment with unique characteristics that readily distinguish it from western pornography. For legal reasons, the vast majority of so-called reality porn involves professional actors and actresses posing as so-called amateurs. Starting with erotic stories and woodblock prints from before the 20th century, Japanese pornography evolved into distinct subcategories with the media that in addition of pornographic videos and magazines featuring live actors, there is exist categories of pornographic manga , pornographic computer games , and pornographic anime . Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. The work of Bruce Seven horny milfs has been called reality porn, due to his lack of using scripts and asking his performers to act naturally in their own character. Though there have been numerous gang bang pornographic films since the 1980s, they usually involved no more than half a dozen to a dozen men. Clothes wetting: The person is sexually aroused by wetting one clothing or observing another person doing so.