A 28-year-old South African endured a rare case of “penile strangulation” after squeezing his wedding ring around his sex organ for “erotic reasons,” according to the South African Medical Journal.

The unnamed man was apparently attempting to use the wedding ring as a substitute cock ring ― a sex toy that holds blood in the penis to heighten sexual response.

The ring caused the man’s penis to swell up so much that he was unable to remove it.

When the patient’s mother brought him to a hospital in Limpopo four hours after, his penis was erect and blue, according to doctors.