Actually there are threads archived on this. If you play with the search box you should find some conversations on it. When we first came here, we use the search and find tons of stuff.

As for if it works, sorry we have never tried it. I do remember reading the thread though. I will say, we would never try it. If it hurts, best not to engage in that. There are also threads on getting started, etc on anal. The threads have the advantage of yrs of comments from members. Whereas currently there are very few active commentators.