Temperature play
From wipipedia.org
Temperature play is a form of sensation play where objects and substances are used to stimulate the body's neuroreceptors for heat and cold for sensual effect. Substances can include water, oil, molten wax, and ice.
Objects can include cutlery, ball chains, necklaces, and many others, often preheated in hot water or chilled in ice water. Blindfolds are often used to intensify the effects and bondage can also amplify the experience.
Safety precautions should be used which are appropriate for the materials, techniques, and body parts involved.
