Guides

Male chastity: what a chastity cage is and how it's used

Male chastity means wearing a locking device that prevents erection and orgasm, usually with someone else holding the key. The device is called a chastity cage, a penis cage or a chastity tube, and the person in charge of it is the keyholder. In femdom that keyholder is a woman, and the cage becomes the most literal form of handing her control. Here's what the devices are, how they fit, where the idea comes from, and the safety rules that matter more than anything else on this page.

What a chastity cage is

A modern chastity cage has two parts: a ring that sits behind the scrotum, and a cage or tube that encloses the penis and locks to the ring. With the lock closed, an erection becomes uncomfortable or impossible, and so does anything that would lead to orgasm. A 2026 expert opinion in the Journal of Sexual Medicine described the typical design the same way: a base ring positioned behind the scrotum, and a cage that prevents full erection.

In kink, the meaning of a chastity cage is less about the hardware than about who has the key. Wearing one hands the most private decision a man makes about his body to someone else. That's why male chastity sits so naturally inside femdom: every hour locked is an hour of obedience, and every request for release is a request she can refuse.

A quick note on the word, because search results get confused. Chastity also means sexual abstinence as a virtue, and a lot of what comes up for the word is religious. This page is about the device.

The myth of the medieval belt

The popular story is that crusading knights locked their wives into iron belts before riding off. Historians are clear that there's no credible evidence for it. The first detailed mention of a chastity belt is in a 1405 military treatise, Konrad Kyeser's Bellifortis, and even that is uncorroborated. Many of the "medieval" belts once displayed in museums have since been withdrawn as probable 19th-century creations. The historian Albrecht Classen's 2007 book, The Medieval Chastity Belt: A Myth-Making Process, calls it a popular myth that spread in the 19th century.

The real history is less romantic. From the 18th century until the early 1930s, devices were sold and patented to stop masturbation, which doctors of the time wrongly treated as an illness. The consensual kink devices came later: steel belts from a Sheffield maker from the 1950s, the plastic CB-2000 in the late 1990s, and in recent years a wave of 3D-printed cages. Slate reported in 2024 that one maker of 3D-printed cages had passed 70,000 orders.

Materials and types

Cages come in a wide range of materials, from soft plastics to high-security stainless steel. The main families:

• Plastic and resin. Light, cheap and the usual first device. The classic CB-2000 of the late 1990s was made of ventilated polyurethane.
• 3D-printed nylon. Custom-sized and popular since the late 2010s, often printed to order.
• Steel and titanium. Durable and secure, heavier, and favoured for long-term wear. Note that 316L stainless steel contains nickel, which matters if you have a nickel allergy.
• Full belts. Waist belts with a shield, more secure and more conspicuous, mostly for dedicated long-term wearers.

You'll also see shapes described as flat or inverted, meaning the cage is short and flat or curves back inward. These are niche designs for experienced wearers, and the definitions come mostly from manufacturers rather than any standard.

Getting the fit right

Fit decides whether chastity is a pleasure or a misery, and the ring matters most. Rings are measured by inner diameter, and makers typically offer several sizes; one 3D-printing maker's range runs from 38.1 mm to 60.3 mm. Too tight and it pinches and restricts blood flow. Too loose and the device pulls and chafes. Makers warn that a tape measure alone can give false confidence, which is why many first-time buyers try more than one size.

The gap between ring and cage matters too. One maker suggests starting with a gap of about 9 to 12 mm and adjusting from there. A cage that's too short for the wearer causes pressure; one that's too long lets things move that shouldn't.

Wearing one day to day

Most of the challenge of chastity is ordinary life. Clean the device and the skin under it daily with soap and warm water, and dry everything properly: trapped moisture is how skin problems start, and the Cleveland Clinic lists poor hygiene among the causes of balanitis, an inflammation of the head of the penis. Wear loose underwear while you get used to it. Expect the first nights to be hard, because sleep erections happen three to five times a night, and the cage will make sure you notice.

Airports are a common question. Body scanners detect non-metallic items as well as metal, so a plastic cage won't slip through unnoticed, and Slate reported in 2024 on a wearer who was flagged and searched in private. Many wearers simply take the device off before travelling.

Keyholding: who holds the key

A chastity device is only half the kink. The other half is the keyholder: the person who decides when it comes off. In a relationship that's usually a partner. At a distance it can be an online keyholder, a cam mistress or an app that hides the key in a timed lockbox. Our guide to chastity keyholders and apps covers how each of those works and the risks that come with online keyholding.

If you'd rather try chastity with a dominant woman on cam, the chastity cams page explains how sessions run. And if you want to try a structured challenge, Locktober turns the whole of October into one.

Safety rules that come first

There is almost no medical research on chastity cages. The 2026 Journal of Sexual Medicine opinion noted that the devices have not been evaluated in clinical or epidemiological studies. What is known comes from the wider medical literature on constriction: something tight around the penis that can't be removed is a urological emergency, and a 2008 review in the same journal found injuries worsen the longer it goes on.

• Remove the device immediately for numbness, sharp pain, swelling, or skin that changes colour.
• Always keep an emergency key, or an emergency release method, within reach.
• Build up slowly: hours, then a night, then a weekend, before anything longer.
• Clean and dry daily, and check the skin for rubbing or redness.
• If a device ever gets stuck, go to an emergency department. Don't wait it out.

Our page on limits and safewords covers how to agree all of that with a keyholder before you lock. Nothing on this page is medical advice. If you have any condition that affects circulation or skin, talk to a doctor before wearing a device.