The definition clash also appears with the English definition of yuri as any lesbian relationship, as opposed to its sexually explicit definition in Japan. A somewhat controversial ejaculation control technique is to put pressure on the perineum, about halfway between the scrotum and the anus, just before ejaculating. A sex party is a gathering at which sexual activity takes place. Typically featured are hitting, choking, name-calling and hair-pulling. Diaper pornography involves performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. Older names for a pornographic film include stag film, and blue movie. Its primary goal is sexual arousal in its audience. Heterosexual bareback milf fuck sex, as opposed to sex with condoms, not only poses an gay twink porn increased risk of STIs, but for 3d hentai pregnancy as well. Cuckolding can also be mixed with other non-monogamous relationship arrangements with which it has substantial overlap such as Swinging, wife-swapping, open relationships, and polyamory, etc. Mutual masturbation can be practiced by males or females in pairs or groups with or without actually touching another person as indicated by the following examples of contact versus non-contact scenarios: Non-contact mutual masturbation Two people masturbating in the presence of each other but not touching. Both forms of pornography generally contains nudity. Pregnancy fetishism is a context where pregnancy is seen by individuals or cultures as an erotic phenomenon. This stop and go build-up, known as edging, can achieve even stronger orgasms. Mammary intercourse is a sex act, performed as foreplay or as non-penetrative sex, that involves the stimulation of the male penis by the female breasts and vice versa. The name is a reference to gonzo journalism, in which the reporter is part of the event taking place. The range of its individual characteristics is thereby wide. The first explicit pegging scene is believed to have been in the 1975 pornographic film The Opening of Misty Beethoven.