Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. Celebrity sex tapes are amateur or professionally-made recordings of sex acts, as performed by a celebrity and their partner. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. For much of the history of cinema and television, lesbianism was considered taboo, though since the 1960s it has increasingly become a genre in its own right. Commercialized pornography accounts for a nearly US0 billion worldwide hentai sex industry for the production of various media and associated products and services. Pornography in Japan horny milfs is large and intertwined business of adult entertainment with unique characteristics that readily distinguish it from western pornography. Transsexual pornography is a genre hot gay sex of pornography. The original definition of dogging – and which is still a closely related activity – is spying on couples having sex in a car or other public place. In Canada, Teletoon offers up its own Teletoon at Night programming block. Once insertion is complete, the fingers are either clenched into a fist or kept straight. Depictions of male and female masturbation are common in pornography, including gay pornography. This may help them develop their orgasm, increase its pleasure, and may inspire them to masturbate on a more frequent basis. Use of the agreed safeword is seen by some as an explicit withdrawal of consent. Some men also enjoy anal stimulation, with fingers or otherwise, without any prostate stimulation. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. If this is done using penises and/or strap-on dildos, this is sometimes called the sandwich or BigMac. Interactive pornography, available in CD-ROM and DVD format, allows the viewer to select the particular acts performed at any one time, sometimes with the camera providing a first person view.