The human body is a truly amazing thing, but, despite our top-of-the-foodchain status, we still have plenty of odd quirks and imperfections. It appears, on a purely chromosomal level, we are outgunned by the humble crayfish and should perhaps show them a little more respect (rather than a splash of lemon and a portion of chips).

So next time you're down the pub with your friends and your smalltalk tank is running on empty, why not dazzle them with a few of these odd, yet intriguing, facts? Who knew, for example, that the tooth is the only part of the human body that can't repair itself? Great news for dentists - not so good for boxers.

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And it seems that the French have been right all along - it's far more hygienic to kiss someone ‘Hello’ than it is to shake their hand. That said, there are some people who you'd undoubtedly look forward to kissing (purely on health grounds), and some who you'd willingly run the risk of a few germs if it meant keeping them at arm’s length.

And you can bet fact number 22 will have been rolled out at many a Specsavers board meeting to groans from all present. So, without further ado, go ahead and feast your eyes on our collection of utterly useless but occasionally interesting health and body facts!

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