While you can use these for any other type of orifice too, “anal” dildos specifically refer to those that feature a flared base for safety. Since the anal muscles can accidentally suck things into the rectum, this acts as a stopper and often also allows the dildo to be used in a strap-on harness. Some anal dildos feature a suction-cup base which lets the user securely attach the dildo to a flat and smooth surface such as a tile wall or on the floor. It can then be used for all kinds of hands-free fun as you thrust away!