My wife could turn to me and she may say, ‘Why do you love me?’ And I can with all honesty look her in the eye and say, ‘Because our pheromones matched our olfactory receptors.'

Source: "Science versus Wonder?" TEDGlobal 2011. Nov. 2011. Conference Presentation. Additional Information: According to science-friendly comedian Robin Ince, understanding the science behind things doesn't remove the joy and wonder out of life, as many claim. He gives the example, illustrated in this quote, of telling his wife the scientific explanation of why he loves her. Ince goes on to say that knowing the rational reason for his love doesn't make it any less real. Watch the full TEDTalk here: Robin Ince - Science versus Wonder?