Costes has been played on NTS shows including Lucifer Over LA, with Mourons Ensemble first played on 30 July 2018.

Jean-Louis Costes is a noise musician. He was once the husband of Lisa Crystal Carver, and he helped write the backing noise-opera music of the Suckdog Circus, and was also a performer in Suckdog, along with Carver, Dame Darcy, Coz the Shroom and others. Costes has released many albums, including Hung by the Dick from Nihilist Records. Costes has been described as the French version of GG Allin.

Some of his albums have been banned in his native country of France for their obscenity.

In 2004, he performed the Holy Virgin Cult show across the United States, scaring audiences away with a barrage of flung feces, urine, tortured screaming, public sex and religious flagellation.