During an average lifetime, our feet will walk 115,000 miles,

or 185,000 kilometres.

That's the equivalent to walking around the world

more than four times.

Each pair of feet has around 250,000 sweat glands.

We release up to half a pint of sweat every day from our feet,

or 100 litres in a year.

The average British foot

has increased by two UK sizes since the 1970s.

We are taller and heavier, in part, due to our diet.

The little micro-moves your feet make

say a huge amount about what's going on in your mind.

Studies suggest men move their feet more when they're anxious,

but women's feet stay still,

though they do release a nervous energy

as they become more comfortable.

Men tend not to give clues

about their attraction towards a person with their feet,

but women do.

An open posture and foot movement away from the body

are clues of attraction.

In ancient Egypt, nail polish was used to show social standing.

The lower classes often wore nude and light colours

while high society painted their nails red.

These days, well, it's up to you.

If you think you can stop feet communicating by covering them,

think again.

A study from the University of Kansas

found people are able to accurately guess age,

income and a number of personality traits

just from looking at their shoes.

Practical and functional shoes tend to be worn by agreeable people.

while old, but well-kept shoes, suggest a conscientious owner.

Research has found the brighter the shoe

the less anxious the owner tends to be.

Like shoes, your socks can be equally revealing.

In Silicon Valley and elsewhere,

wearing colourful or flamboyant socks

is an acceptable shot of flair for men

in a generally dressed-down culture.

If your second toe is larger than the big toe, that's called Morton's toe.

The ancient Greeks loved this shape of foot -

you see it all the time in their sculptures.

About twenty to thirty per cent of people

have what are known as Greek feet.

So-called Egyptian feet are when the toes go down one by one in size,

in a straight line.

The Egyptians were into their perfect measurements.

A so-called Roman foot is where the toe and the two toes next to it

are roughly the same length.

Good for walking.

And why are our feet so ticklish?

And why does tickling make us laugh?

It's a mystery that's perplexed thinkers

from Plato to Galileo to Darwin.

The soles have a high concentration of Meissner's corpuscles -

highly sensitive nerve receptors.

Scientists believe these evolved as a defence mechanism

to protect vulnerable areas of the body from injury.

It is also thought that tickling encourages social bonding.

You can't tickle yourself!