But whether you're shy or not about proclaiming your love, the reality is that this day is big business.

CNN: Tracking love across the globe: A complex business

She asked him how he was and how his day had been, and Mr Love, though a bit shy, politely told her how much he was looking forward to watching Scotland play football that evening.

ECONOMIST: Kith and kin get closer, with consequences for strangers

Andreessen and Horowitz never seem shy about saying what they think, which we love.

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But Howard Hughes, strange, shy, intense and beetle-browed, fell in love with them, and decided that much of the money he was dispensing through Hollywood in the 1940s should go towards advancing them.

ECONOMIST: Jane Russell

While becoming the CEO of any big-name company is probably more than most of us can hope for, if we are honest there are CEO opportunities that we would all love to have a chance at, and others that most of us would instinctively shy away from.

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