we've compiled a collection of tools to practice the art but it would be churlish not to agree that you're already carrying around the equivalent of a swiss army knife.

fingers - unlike other tools, they provide feedback. close your eyes and feel. you have finer control, movement and application of pressure than with any other tool. you can deliver subtle, nuanced and exquisitely delicate contact.

nails - abrasive, cutting, unyielding. the perfect antidote to gentle fingertips. nails leave marks on the body they can scratch, slice and draw blood

breath - surprisingly nuanced and you can dive pretty deep into this approach. your breath adds temperature into the mix and you can combine this with other tools

tongue - some say the most sensitive part of your body

teeth - gentle and playful or a shocking and powerful sensation. keep it below the clothes-line.