Animated Video Traces The History of Valentine's Day

I haven't actually stopped to think about why we celebrate Valentine's Day since...well, probably since around elementary school when we were given a watered-down lesson to explain the holiday. But this animated video from Ya Bo (via LaughingSquid) shows that there's a much darker history to it than I remembered. Watching this should give you a little shift in perspective when you're out buying flowers and candy for the one you love to celebrate this weekend.