I've got to try this as a whole new sensation as well, in addition to my fleshlight. I need to be shoving and humping my penis pretty frequently, and hadn't heard of this. In the spring/summer I do some pool cleaning part-time. Once it's cleaned and nobody's home (love houses for sale) I'll make sure the water jets are turned on, get my swimming trunks off and just hold on to the side of the pool with those jets giving me a full erection at first, then a full body orgasm soon after shooting out all that sperm.