Merry Valentine's day, here are some poems and tangents about love from a few centuries ago! Do you know where lovelorn sighs come from? Lorenzo does! When your heart is all aflutter, it heats up the air in your lungs and the air comes rushing out in a big, wistful sigh as you gaze soulfully at the one who houses your heart (which popped out of your ribcage and through your eyes into the eyes of your love when your gazes met). Nothing to do with oxygen at all!