When using Listerine® -- FOR ITS INTENDED PURPOSE -- you should rinse until: (a) The cows come home (b) Your mouth goes numb (c) Your entire head goes numb (d) You go into shock (e) You go into therapy (f) You 'graduate' from treatment, finally (g) Clam futures start to rise (h) Dinky says you can quit (i) It flat out kills you . . . While we're at it, let's cover the obligatory bases: (w) All of the above (x) None of the above (y) All possible permutations of the above (z) I dunno, I just work here . . . What's that?...Um, no, we won't be grading on a curve; G33 is busy enough as it is.