Movies :: The biggest collection of pornography is kept in Institute for Advanced Study of Human Sexuality which is in San‐Francisco. There are approximately 80 000 books and 150 000 porno movies in the collection. The whole collection also includes posters, playing cards and other porno stuff. -The oldest porno film is the Argentine film "El Sartorio", which was produced in 1907.
Realistic vibrator :: is sex toy made by the way of taking a cast of real penis. Modern sex industry offers realistic vibrators, which repeat the size, color and shape of real penis. Due to the latest technological developments, one can find realistic vibrator which does not differ from natural penis. Such likeness with natural penis is achieved due to the material, which is used in sex toys production. Each producer has its registered trade name of the giving material. Cyberskin, Ultra skin, New Futurotic Material, Loveclon, Magic Flech and others. As all varieties of the giving material are similar to each other according to physical properties, most sex stores use such term as cyber skin which unites all realistic materials.
Butt plugs :: may be in the form of a cone or finger. Men put such plugs in anal orifice for prostate stimulation. Women do it with another purpose: plug fills up the area of rectum and presses down on vagina outside, reducing it in size, so pleasure increases during sexual intercourse. Butt plug is also applied for the relaxation before anal sex or for the constriction of vagina. The last one can be used by women with wide vagina (for example when her vagina muscles are loose after delivery, and also for increasing of sensations during sex. It is recommended to use butt plug with water based lubricants.