Mutual chastity

When visiting an erotic fair I lingered quite some time at a boot selling chastity devices and other cbt tools. Finally I got to have an interesting chat with the representative, who explained me the pros and cons of the different chastity cages. Quite a revelation.
It turned out that he was an active member of the gay bdsm scene and he told me that in this subculture chastity cages were often worn by both partners. They were each others keyholder and the use of chastity cages was not primarily for chastity, but rather as a torment or torture tool to make erections painful and highten lust.
Now I am wondering, is this also common in heterosexual relationships? Are there couples where man and wife willingly wear chastity devices?