I don't think I'd want someone to play around with it if they didn't know what they were doing either. I am interested in the "nice vs mean" ways to do it. I requested the nice version. Burning the hair off first (a male), not using oil on the skin, or afterward striking the spots with a glove with tacks stuck in it, I believe those qualify as "mean". And ways to make it more SM and less therapeutic.

The mechanical cups would be vacuum powered then, vs. hot-air-cooling caused suction?