Well I thought that tummy buttons were only the result of the umbilical cord attachment to our Mum's in their tums, but no - I have found a useful purpose for them. Not tummy button fluff as you might think, no! As my tummy grows with our baby Selah's growth, my tummy button is popping out and allowing for some of that skin stretch that inevitably happens. Imagine if a pregnant lady had no tummy button - there'd be a whole tummy's worth of skin to keep stretching and stretching! Amazing.
It does make you wonder how much detail God might have thought through when making humans.