They don't need to, but they can. Same with eating. Amethyst is the only one who partakes in sleeping and eating within the show though, since she finds them enjoyable (and given she's lived on Earth her whole life, it makes sense she would adopt lots of Earth customs).
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Mistress Fortune
Apr 20, 2015 at 11:23PM EDT in reply to
Icecane
Apr 20, 2015 at 08:45PM EDT