There seems to be a strong positive correlation between creativity and kinkiness that can definitely be a lot of fun to explore. For example, in the area of ha

There seems to be a strong positive correlation between creativity and kinkiness that can definitely be a lot of fun to explore. For example, in the area of hackable unconventional sex toys, ideas I haven't seen here but that may be worth exploring: solenoid valves (to control fluid or air flows? — test! — have emergency release valves!); linear actuators and a few pumps (see above); in-line flow meters (to measure them? Interesting elements of breath control possible); pin lattices with solenoids/linear actuators/similar (programmable textures?); and, of course, inexpensive accelerometers. Things I have seen, and played with which have been variously modified include certain TENS units (not really a fan) and 'violet wands' (a fan!). There might be product ideas here, but they're likely to be kind of… niche. Still, kinky people can host quite dedicated niches sometimes (and that's about all I'm going to say about that here! <g>).