If you passed GCSE biology and didn't just snooze your way through sex ed then you might think you know what all the bits and pieces of human anatomyrelating to the penis are there for. And hey, if you do then GO TEAM YOU.

But that isn't the case for everyone and as it turns out, the group of guys and girls we challenged to have a go at labelling the male reproductive system actually found it pretty tricky.

Check out what went down below and hey, maybe it'll even refresh your memory...

Told you it was harder than it looks. No pun intended. AHEM.