Love can make you feel euphoric, foolish, happy, obsessed, distracted, passionate, exhausted and pretty much everything in between -- so it should come as little surprise that falling in love does quite a number on your brain. When you fall in love with someone, a whole host of changes are taking place in your brain and body to create all that passion and euphoria, and of course the less desirable effects, too. While you're enjoying some time with your significant other this Valentine's Day, take a moment to marvel at the science of love -- and to appreciate the incredible effect your partner has on your noggin! Scroll down for eight crazy things that love does to the brain. 1.