When last did you give your skin a second thought? Right. About 20 years ago? Maybe it deserves your attention, if only to prevent people telling you you’re looking tired. Again.

So you've just come home from the job and your woman complains that you are a bit too smelly for her liking. Well you can start by realising it’s your sweat glands that do this.

Eighteenth century aristocrats considered moles a beauty; these days moles have acquired a more sinister character, because of their association with skin cancer.