BBC Future

Why do men have nipples?

And aren’t they pointless? Earth Unplugged lifts the lid on perhaps the ultimate male mystery.

Pointless, aren’t they, but why do men have them?

Maddie Moate and Simon Baxter reveal that the reason men have nipples is because women do. It hasn’t been written out of our development programme, the early stages of embryo follow a female blueprint until the testosterone kicks in. And some men can lactate too – scroll to 3:00 to find out more.

For more videos subscribe to the Earth Unplugged channel on YouTube.

If you would like to comment on this story or anything else you have seen on Future, head over to our Facebook or Google+ page, or message us on Twitter.