Our natural condition is to be wibbly-wobbly and slippy-sloppy and therefore vulverable.
So we cultivate an ideal of hardness.
We aspire to look like statues,
we work out,
we present ourselves to the world in clothes which- from the suit of armour, through the corset to the business suit- suggest toughness and sleekness
and we make a taboo of the sex act because, to the outside observer, it is then that we are at our most flobbelly-dobbelly.