A popular type of chastity device for men is commonly referred to as a chastity cage, penis cage, or chastity tube. They are almost exclusively used as a sex toy and in BDSM play, and may enclose a man's penis in order to make an erection uncomfortable or impossible if the man becomes sexually aroused, and prevent sexual intercourse, masturbation, oral sex involving the wearer's genitals and some other forms of sexual activity. A chastity cage may be combined with toys such as a shock collar or ball crusher.
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.
The ring and cage are usually secured together with a lock or with a tamper-evident plastic security seal. When the device is locked, the testicles are trapped in the gap between the ring and the penis cage which is narrow enough to prevent the testicles and penis from being pulled out. The testicles are usually held in a fixed position, exposed beneath the cage although some designs have an additional cup that prevents easy access to the entire genital area.
Chastity cages can be manufactured out of a strong plastic material such as polycarbonate, ABS, or they may be made from silicone which greatly reduces their cost and weight compared with stainless steel versions. New information implies that caution should be taken before using a device made from BPA containing plastics such as polycarbonate. A device made from ABS plastic is a safer alternative to polycarbonate plastic due to polycarbonate leaching BPA through long term contact with the skin. BPA can cause an estrogen response in men leading to hormone imbalances and possible shrinkage of the penis through the leaching of endocrine disrupting chemicals directly through the skin.
Most chastity cages are intended for long-term or indefinite wear and may include a lock with keys retained by a key-holder, or a plastic locking device which incorporates an identity number so that the wearer may be locked by a remote key-holder. When combined with such a tamper-evident plastic seal, plastic chastity cages permit easier access through airport security or other security restricted areas that require passage through metal detectors.
