Homework. Because the lingering odor from my vaping is, in my wife's words, 'like an interestingly scented candle,' I am allowed to vape in the 'office' while doing schoolwork. As a result, I can sit in the office, being productive, and vape away instead of walking outside every 40-50 minutes to light up an analog. It's a delight just grabbing my Vamo or Magneto whenever the urge strikes, and grinding away on homework without pausing.