Wax
From wipipedia.org

Wax is a substance with a variety of uses.
Its commonest use in BDSM is as part of temperature play; see Wax play.
Waxing is used as an alternative to shaving to remove body hair, for example by transvestites and by women who want to wear very scanty clothing without showing any pubic hair. Waxing can be painful, so could be used as a technique in torture.
Filling the ears with wax is an effective alternative to earplugs.