Strap on dildos are very popular among lesbians but not so obvious is heterosexual couples also enjoy the use of this product. There are also models which vibrate and can add extra stimulation. Usually this product is worn by a woman who will penetrate her partner. Her partner can be a women or a man. Plenty of lube and care should be used especially the first time working with this device. If the person being penetrated is a woman then great care should be used to change a condom or completely clean the device before changing from either the anus or vagina. Water based lubricants work well. Do not use silicone lube with silicone products.