Lying

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We’re not talking about the little white lies (number of sexual partners, anyone?), but more the whoppers that are inevitably going to unravel at some point and leave you red-faced and alone. Little details, like you are already seeing someone, are best out in the open.

If you have to do it, keep your lies manageable and harmless, and trace back paths down which they might fail. Claiming to be a Wimbledon Tennis umpire is going to be a tricky one to back up, at least for one month every year.