Some Strap-On Dildos and dongs come with vibrating devices attached externally for increased stimulation. Strap-On Dildos Strap-on Dildos and Dongs are made from a wide variety of materials including silicone rubber, jelly, glass, steel, Cyberskin and PVC. Strap-on Dildos and Dongs come in all shapes and sizes as well as every color imaginable. Strap-on dildos are used by both genders and all sexual orientations. Male strap-on dildos feature a hollow void in the Dildo so the Dildo acts as an extension of the penis and women can wear the strap-on in order to pleasure their male partner by inserting the Dildo into the anus of the man. Strap-on Dildo Harnesses are popular with lesbian partners and are used to penetrate each other vaginally and anally. Some strap-on dildos are designed to pleasure both partners at once by using double-ended dildos in the harness.