An open heart collects a lot of air particulates
Aka pollution; it may turn gray, with black spots... wipe it off every couple of days, bleach, re-lacquer, unless you like the spots.
An open heart requires: Weather-resistant furniture so the shifting storms that occupy don't cause damage; space heaters when it gets cold, because it will; and good music to create atmosphere....
Fortunately, despite all this, everybody wonderful a sunny terrace to a stuffy room. There's nothing so refreshing.
