Complex sentence: The Cenobites all have horrific mutilations and/or body piercings, and wear fetishistic leather clothing that often resembles butchery garments and religious vestments; the clothing also serves to support their piercings and tools.
Split into simpler sentences: The Cenobites all have horrific mutilations and/or body piercings, and wear fetishistic leather clothing that often resembles butchery garments or religious vestments. The clothing also serves to support their piercings and tools.