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Hello, this is 6 Minute English from BBC Learning English. I'm Neil.

And I'm Sam. Many people have favourites.

My favourite colour, a favourite flavour, a favourite word.

What's yours, Neil?

Mmm, my favourite colour is green.

My favourite flavour is sweet and sour.

And, well, I don't know if it's my favourite, but there is a word I really like saying out loud.

Ninkam poop. It means a silly person.

For me, it's the taste of coffee and the smell of lavender or freshly baked bread.

Mmm, our favourite tastes, smells and colours are controlled by our five senses.

Sight, sound, smell, taste and touch.

For most of us, they don't mix.

We see colours and taste flavours, but we can't taste sounds.

But that's not how everyone's brain works.

Imagine being able to taste every word that you hear.

In this programme, we'll meet two sisters from Glasgow in Scotland who can do just that.

And as usual, we'll learn some new vocabulary as well.

Julie McDowell and her younger sister, Jen McCready, have synesthesia,

a neurological condition where two or more senses mix together.

When synestheats, as they are called, hear a word,

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