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.
For more videos subscribe to the Head Squeeze channel on YouTube.
If you would like to comment on this video or anything else you have seen on Future, head over to our Facebook or Google+ page, or message us on Twitter.