 However, when it came time to hold the child, my brain froze. This was a literal baby that my friends had made and it was in my hands. I was terrified. So, of course, I reverted to muscle memory, petting it on the head like I do to my dog. I like to think that the scratch behind the ear was appreciated. My friends thought so anyway. I'm Alex Lathbridge from the BBC World Service. This is Unexpected Elements.