Happy Valentine's Day!
Pictures of Cupid appear around the place at this time of February.
The obvious design question revolves around the machinery of love, or the history of archery.
What makes love work is a little bit too big for me to tackle tonight, so here's a nice little running history of the story of bows and arrows.
In case you're wondering, Cupid is normally seen armed with a recurve bow (compound bows and cross-bows coming onto the scene long after his innovation).