I don't know the history of Valentines day, some say it was created by companies seeking additional sales. I have read otherwise, but who really knows?
One thing that I know for sure, I learned this a long time ago, the hard way, is that I better come to this day prepared.
Go out and get something for your significant other, or he/she may just decide to like you a little bit less, at least for a day.
Don't say I didn't warn you!