Has anyone had first hand experience of wearing these harnesses called spreader pants. The have an impossibly large plastic gusset that forces your legs wide apart making it impossible to walk. I've seen them on you tube, a few online stores and a hypnosis audio site. Me, I love the idea of being only able to crawl but want to know if anyone has tried them. Are they safe? can they be undone by the wearer. I assume they can be wore with a diaper. My legs can spread fairly wide (I can no longer do the splits) but they look a bit punishing.