Amongst others, I found these products:
For a long time the main challenge in PE for me has been heating hard, collagenous tissue to a sufficient temperature so that it’ll be more willing to extend and hopefully deform. I’ve always assumed infrared light to be the best way to go about this. But what about ultrasonic? I know it can be used to heat deep tissue more effectively and far faster than infrared light, which needs to gradually penetrate the layers of soft tissue and heat them up in turn before the underlying ones will be heated, whereas ultrasonic soundwaves, not being electromagnetic in nature, but being like normal sound waves, that is, the vibration of whatever medium the kinetic energy is moving through.
Would it be safe to use directly on the penis? Would it be a good way of heating collagenous tissues, particularly the ‘dorsal cord’ I and many others are plagued with? Does anyone know?