Macrophilia is a fascination with or a sexual fantasy involving giants, more commonly expressed as giantesses . Is also common of the furry genre. The range of its individual characteristics gay sex is thereby wide. 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. Femdom features BDSM scenes in which the dominant partner is female. Solo performances in gay pornography have been described in 1985 as either or both active and/or passive , whereas female solo performances are said to be exclusively passive . Bara male homosexual hentai designed to appeal to men. As of 2013, little analysis of this paraphilia has been reported in medical literature. 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. In Canada, Teletoon offers up its own Teletoon at Night programming block. The reverse of this, in which nude women interact with clothed men, is called Clothed male, naked female . Detective magazines, comic books and early fetish magazines In the early 20th century, Detective magazines covertly provided a way of publishing bondage imagery. Men may also rub or massage the glans, the rim of the glans, and the frenular delta. A crush fetish is a fetish in which one is sexually aroused usually when someone crushes objects, food, and sometimes small animals with their body, usually under their foot, or when crushed oneself. Dwarfs or midget pornography features performers who are dwarfs/midgets. Omorashi: The act of holding one own urine until the need to urinate is urgent, making another hold in their urine, or watching another person with an urgent need to urinate. Double penetration of the vagina, anus and mouth, can involve: Simultaneous penetration of the anus by two penises or other objects. Sexologist Alfred Kind suggested that the buttocks is the primary sexual presentation site in primates.