Housework
(Standard disclaimer: I don't own YYH or its characters; they are the sole property of Yoshihiro Togashi, Shonen Jump Comics Weekly, Studio Pierrot and Fuji Television)
There was an old Ningen saying, 'cleanliness is next to godliness'. Of course, Hiei could care less about ningen and their silly proverbs. He did, though, enjoy watching the fox clean his small apartment.
Kurama meticulously dusted and polished each piece of furniture until it gleamed; swept and mopped the hardwood floors until you could (if you so desired) eat off them; and scrubbed the bathroom – shower, tub, sink and commode – until they shone.
However, it wasn't how Kurama did his cleaning that had Hiei enthralled, it was the way in which the kitsune went about his work… completely nude!