If you're planing that your secret never gets reveiled, don't. Shit will hit the roof and you really don't want to be part of it, it's not worth it. I have never had the experience but have heard about it enough to know that it is not a good idea. But then again if you are a horny guy that never thinks of the consequences, go for it.
My advice to you is either, abort - stay friends, or take it slowly.
Good luck.
