Ok so i used to have this sleeping bag. It was like a silky material, satin i guess. I used to roll it up & find the right side to use & would start pumping away as if i was having sex right then. It felt so awesome. I don't have it at my huse anymore so now i just wait till i'm about to take a shower & use hair conditioner. That stuff works so smoothly. Especially the whole stop & go thing. Man.