The Smell That Decides Who You Love

You think you chose who you fell in love with - their face, their voice, their laugh. But the real decision was made by your nose, below your conscious mind. This is the science of scent-based attraction: how your body reads another person's immune genes through their smell, the famous sweaty-T-shirt experiment that proved it, the disturbing way the pill flips the whole thing, and how perfume and dating apps quietly unplugged the one sense built to choose a partner. Sources & further reading: Wedekind et al., "MHC-dependent mate preferences in humans," Proc. R. Soc. B (1995) - the T-shirt study Wedekind & Furi (1997); Roberts et al. (2008) - the contraceptive-pill reversal Roberts et al., "Relationship satisfaction and outcome in women who meet their partner while using oral contraception" (2012) Napoleon's note to Josephine - historical anecdote