Although about half of the adult population produces it and the other half typically knows about its existence, it’s surprising how little people know about sperm. I am by no means an expert like andrologists but through my work have learnt a thing or two.

I’m honoured to have been asked to share some of this knowledge with 1,400 people at Ignite Cardiff next week. I shall be talking nuts and teaspoons and, because it’s for charity, selling a pineapple…

Any guesses what a pineapple has to do with sperm? Find out in Cardiff or watch the video later on.