I have written about bathing before, but it's time to revisit the pleasure and luxury of bath time. Up until a few months ago, I had never used my bathtub for anything more than a vessel for a daily shower. Now I've turned my tub into a veritable hydrotherapy spa. I've stocked my shelves with a variety of irresistible essential oil bath treatments and even as the warm months approach I continue to bathe — just in cooler water.