HD, I use that formula all the time...My wife is blonde and that's how I get more airplanes...its the art of explaining that's key...Hmmm, once or ounce... which ever is correct...their head starts hurting from trying to figure out what you are saying, you can pretty much do anything. Don't try it on a brunette...you may end up hunched over coddling your manhood...works on redhead sometimes...but if it fails much worse consequences than with brunettes...Stay safe, blondes only, is my recommendation...