Temperature play

Heat or cold on the skin — wax, ice, glass, or a switch between them.

Why people do it

Heat and cold read as intense without being damaging, and switching between them scrambles the nerves in a way nothing else does. It is dramatic to watch and cheap to try.

Smallest way in

An ice cube traced along the inside of the arms and the chest. Then, if that lands, one drop of wax from a low-temperature candle on the thigh, from height, before anything else.

What to watch

Only candles sold for the purpose — soy or paraffin made for body wax. Never beeswax, never a scented jar candle, never anything with a wick that pools hot. Test one drop on yourself first, from the height you intend to use, and stay off the face, the genitals and any broken skin.

In the planner

15 different things carry this tag, and switching it off removes every one of them. The mildest of them sits at easy.