The term soft crush refers to the more common fetish surrounding videos involving inanimate objects or small invertebrates being crushed, while the term hard crush refers to such videos involving larger animals horny milfs with vertabrae, and arguably more pain-susceptible animals . Animal masturbation has been observed in many species, both in the wild and in captivity. Internal ejaculations, followed by images of semen dripping from the anus, are sometimes depicted in bareback gay pornography, where they are referred to by the term breeding or the reverse money shot. This can, however, redirect young gay porn semen into the bladder . The name of the practice, when it is done in a repeated in-and-out motion, is derived from its passing resemblance to the dipping of a tea bag into a cup of hot water as a method of brewing tea. Bondage/BDSM Bondage pornography features performers tied up or constrained in various ways. It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. These scenes may either have the cameraman directly engaging in sex or merely filming others having sex. The inside of a smotherbox is often padded to provide support for their neck and prevent their head from moving. English adopts and uses hentai as a genre hentai videos of pornography by the commercial sale and marketing of explicit works under this label. Bisexual DVDs sell much better online than in adult video stores, possibly due to customers in stores feeling embarrassed to buy them. It may be used as foreplay, or as an alternative to sexual penetration. One or more of the participants may engage in autoerotic sexual activity, such as masturbation, possibly without physical contact with the other participants. It is commonly depicted in pornography, but very rarely in mainstream cinema. Bareback sex is physical sexual activity, especially sexual penetration, without the use of a condom. Since the 1980s, many practitioners and organizations have adopted the motto safe, sane and consensual, commonly abbreviated as SSC, which means that everything is based on safe activities, that all participants be of sufficiently sound/sane mind to consent, and that all participants do consent.