One enjoyable pastime I have engaged in is adding colour to the submissive’s genitals. This can be the shaved labia or the shaved cock and balls. Stripes using Henna can be fun and lasts a number of days. I have also used washable felt pens and food colouring for stripes or a total colour change of the area in question. Red, green, blue or orange can be fun. However I have a question as all of the colouring materials I have used so far have one problem or another. Either too dull or they can come off and stain precious fabrics.
Has anyone used a bright product for colouring skin which does not have the potential to rub off onto precious fabrics and stain?