Because your senses are almost all pleasurable additions to erotic play--your skin is your biggest sex organ! Temperature, whether warm or cool, is a great way to add new sensation and make old familiar oines take on a new vibe (whether you are using a vibe or not!). It can be kinky and flirt with pain or predicament play--or it can be soothing and sensual, especially if you match it up to the seasons--warm it up in the winter and cool it off in the summer.

Try a glass or metal toy; already cool to the touch, they can get even cooler if you dunk them in cold water for a few minutes, or you can make the water warm and add some lovely heat to your play. Some vibrators and other powered toys have an extra button so you can warm them up. Massage oil candles and hot wax play for kink are both popular and sensation-al kinds of temperature play. And heating and cooling lubes can add bite or burn to your genital play too.

• We recommend you use the heating/cooling lubes externally (not everyone wants those sensations internally, and you can't turn off the hot or cool quality at will, whereas externally, it's easier to wash them off if you're ready for the sensation to stop).
• Candle play is safest with low-melting point wax like soy; if you are using regular wax like paraffin, we recommend you start with unscented white candles (added color and scent might burn hotter). If the person receiving the wax has much body hair, oil it first so the wax will be easier to remove. Don't get it in the hair or near the eyes. Dripping wax from a higher distance lets the wax cool more on the way down, but it's also more likely to splash. and remember--it's a candle! Watch where you set it  down to avoid fire or wax spills.
• Don't cool your toy in the freezer--stick with cool water--because a frozen toy, especially a metal one, can stick to the skin. If your glass toy ever hits a hard floor, retire it--especially if you use it for temperature play. Glass sex toys are made to be durable, but dropping one on a stone or concrete floor can create internal damage and heating and cooling it at that point can make the damage more extensive.