Love really is like a drug Love (or maybe lust) not only blocks pain, it also seems to stimulate the same parts of the brain as cocaine

Romeo and Juliet: Love conquers all – including pain. Photograph: Dee Conway

Intense spells of passion are as effective at blocking pain as cocaine and other illicit drugs, a team of neuroscientists say. Tests on 15 American students who admitted to being in the passionate early stages of a relationship showed that feelings for their partner reduced intense pain by 12% and moderate pain by 45%.
full article
http://www.guardian.co.uk/science/2010/oct/13/love-drug-pain-relief-cocaine