With winter among us, many cold-bodied consumers are jumping into a hot shower to warm up. And while they’re enjoying the water relieve tension from sore muscles, they’re using their half-hour showers as spa time to do, well, everything—from washing and conditioning hair, to cleansing their body and even exfoliating and shaving while they’re at it.  The Everything Shower The concept isn’t a new one, but it’s been given a name that Gen Zers are calling the “everything shower.” Just as som...