If you're merrily munching your way through an advent calendar this Christmas you might have noticed the chocolate tastes different to other varieties.
Now the experts have an explanation.
Most advent calendar chocolate comes in the form of thin discs, with rounded corners and an embossed festive figure on its surface.
This helps it melt quickly on your tongue, which has a large surface area, meaning your tastebuds are treated to a particularly intense chocolate hit.
Also, because you're only geting one tiny piece a day, you'll probably take your time savouring it for just that little bit longer.
