BBC: The science of falling in love
'Head over heels', 'butterflies in the tummy', 'the apple of my eye'- in English there are many idioms to describe what it feels like to fall in love. Aww, I didn't know you were such a romantic, Neil! But do you know what's actually happening in our brains when we fall in love? Because I'm sorry to say this, Neil, but it's more about brain chemistry than romance- specifically hormones, chemical..