Valentine's Day. Blerg. But hey, if we're going to be surrounded by corporate sponsored true love, we may as well have some fun. Here's a video from ASAPScience describing the way love works, scientifically. It's a little more complicated than you might have realised.
First, well, yes. It's like cocaine. Basically, it makes it easier for us to experience pleasure. But it's also key in protecting our young and relatives. That makes sense, since we're created by an unbroken line of organisms going back to the very first life form. So we must have evolved to love our young pretty hard!
So there, love is a helicopter parent. Enjoy Valentine's Day. [YouTube]