By the s, vinyl , latex and silicone had become the materials most frequently used in the manufacture of sex dolls; silicone in particular allowed a greater degree of realism. There is a business, Doru no Mori Doll Forest in Tokyo , that rents love dolls and rooms to male customers. Both this company and the company "First Androids" once offered pelvic thruster motor, audio capability and heated orifices, though these options are no longer available. Some inflatable dolls even have the form of children. There are even mailing lists for discussing techniques and experiences with MLDs material love dolls [ citation needed ]. Even the secretion of Bartholin's glans is imitated, by means of a "pneumatic tube" filled with oil. They often burst at the seams after a few uses, although they are commonly given as gag gifts and therefore many may not be used at all. Extras to customize a doll to one's personal taste wigs, clothes, perfumes, etc. For this reason the " RealDoll " manufacturer reported switching from the tin to the platinum material in June and all other manufacturers have followed suit. Some companies manufacture cloth sex dolls using the same technology that is used to create plush toys. Such artificial human beings are actually offered for sale in the catalogue of certain manufacturers of "Parisian rubber articles. Secondly, the method of retail purchase has also improved, now showing customers what the actual doll, seams, hair, and even orifices look like. These dolls are more of a joke gift or party novelty, and are often not suitable for sexual use. Dolls made of either material can be very lifelike, with faces and bodies modeled on real people in some instances, with realistic skin material similar to that used for movie special effects , and with realistic or even real hair. Firstly, the last twenty years have seen huge improvements over earlier types of sex dolls, and customers come to realize this through using the web. Shin Takagi, founder of the company Trottla, manufactures lifelike child sex dolls in the belief that doing so provides a safe and legal outlet for men expressing pedophilic desires.