Enforced Male Chastity
Male chastity exists because there is a large fan base for it. A base that is growing in popularity daily. Many men enjoy it because they like the way it makes them feel emotionally and physically. Women like it for the same reasons.
A quick rundown: A male chastity is a device that is placed over the male penis to restrain it from being used for sexual entertainment. In such a device, you cannot masturbate, have sex or even get a full hard-on.
My girlfriend loves EMC. She love's to tease me constantly, and our relationship has gotten so much better since we started.