I... I think I love you! Be my Valentine?No the purpose is to sell as much crap as possible. it's an entirely manufactured holiday. The story of St Valentine (there were two or three IIRC), supposedly one of them met with the emperor of Rome and tried to convert him to Christianity. That didn't work out so they sentenced him to death. then while in prison, he makes friends with the guard, who brings him food and seems to sympathize. he couldn't get the emperor, but the guard converts when Valentine says god will fix his daughter's blindness if he does. then she can see and they (the romans) kill Valentine. before he dies, either he write the daughter a letter or the daughter writes him a letter (I forget which) and that's supposedly the first valentine.
That's the story told a thousand years later in a poem anyway, well people go out trying to figure out if it's real and it turns up it's probably not. really, there was a pagan fertility celebration in late winter that the christians wanted to co-opt. see you don't score points with the proles by taking away their parties, so they had to come up with something.
so really Valentine's day is all about subjugating conquered peoples, and executing people for believing in the wrong gods. Then we celebrate it by trying to buy useless things for our significant others in hopes that they will give us a little nookie. Also, there is terrible candy hearts that they make taste bad so you'll appreciate easter cadberry creme eggs.
Enjoy the holiday!