BBC Future

Head Squeeze

What are armpits for?

And why are they hairy? Greg Foot explains all, and also reveals which sex has the smelliest armpits.

There are a few theories for why armpits are hairy. One idea is that they stop your lymph nodes from overheating. Another is that the hairs actually reduce friction when you walk. A third theory is related to sweating and releasing sex pheromones.

But can underarm smell have a role in attracting a partner? And which sex has the smelliest armpits? Head Squeeze’s Greg Foot reveals all.

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