Models Cathrine Andersson, right, and Dipesh Davadra pose for photographs in front of a screen showing line graphs displaying the chemicals in their breath analyzed with a machine at Science Museum's Dana Centre in London, Tuesday, Feb. 9, 2010. The experiment gives an visual analysis of the particles that trigger smell sensation in the hope of finding perfect Valentine's partners as the museum is planning to hold a series of related events starting from Friday, Feb. 12.