Dan Lei has been part of the Danish BDSM scene for more than 20 years and has taught for over ten of them. In 2011 he founded sadistenstoolbox, now the leading BDSM specialist retailer in Denmark and the Nordics, and he still makes gear himself: the Made by Lei floggers are cut, assembled and balanced by hand in his workshop in Skive, and ship to players worldwide.

His teaching covers impact, electro, needles and the psychological side of dominance, and he places particular weight on first aid and risk awareness — the parts of BDSM that rarely make it into a demo but decide whether a scene ends well. Outside the convention circuit he teaches BDSM kurser in Denmark year-round, and he is one of the founders of Kinbaku Camp.