Bottom and submissive are widely recognized terms for those partner in the relationship or activity who are, respectively, the physically receptive or controlled participants. It is used, for example, at fertility clinics to stimulate sperm donors. Shibari is a Japanese word that literally means to tie or to bind. Both sexes sometimes apply lubricating substances to intensify sensation. Pornographic films are typically categorized as either softcore or hardcore pornography. Ass to mouth pornography shows the transfer of a performer penis from a second performer anus to that same second performer mouth in a single shot. Oral sex pornography gay fuck frequently features a person performing fellatio, and less frequently cunnilingus. In S/M, the Sadist is usually the Top and the Masochist the Bottom, but these roles are frequently more complicated or jumbled . It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. The other person may do the same during or after. The Silent Duck, also called Duck-Billing, is the technique often used in which the person engaging in hand insertion shapes the hand to resemble a duck beak. The act may be carried out face to face, or head to tail, with the woman recommended to be on top if she has smaller breasts. Gay-for-pay describes male hentai porn or female actors, pornographic stars, or sex workers who self-identify as heterosexual but who lesbian milfs are paid to act or perform as homosexual professionally. Such ejaculation can be done by mammary intercourse, or masturbation over the other person, or result from the withdrawal of the penis from a partner mouth as he is ejaculating following fellatio, irrumatio, or intercourse. The arousal from being desperate comes from the sensation of having a full bladder. The term sadomasochism is derived from the words sadism and masochism . Transsexual porn star Wendy Williams has stated that transsexual Porn is classified as Straight Specialty. Originating in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography.
