((Jurs))
It only feels good until you wake up and you're next to someone you don't love. Do yourself a favor and get a marriage counselor before you consider "spicing it up" that way... really, if he's an SOB, divorce him, then date. Do your own thing, but don't do it to spite him, because you won't get the reaction you want, and the reaction won't come from him, it'll come from you... There's a certain amount of shame and guilt felt when one "cheats"... Marriage counseling helps, from what I have witnessed, and trying to build up your relationship with your spouse... if you still want to have him as your spouse, that is...
Best wishes.