Most chastity cages consist of a ring seated around the base of the penis behind the scrotum and a tube or penis cage that holds the penis, with the two parts mating together with a hinge or pin. The penis cage is designed so that the penis inside cannot be stimulated directly with hands and fingers. The tip of the penis cage is perforated to allow urine to pass and the design may incorporate vents to facilitate long-term wearing and cleaning. The flaccid penis is inserted into the cage and is held at a downwards angle so as to make an erection uncomfortable or impossible. Some designs have an extra short penis cage into which the penis may be squeezed to restrict it even more than in a regular penis cage. Other designs incorporate a tip covering the glans through which a catheter is fixed, and the tip is then secured by short straps which confine the penis and are fixed to the ring seated behind the scrotum.