Bearing in mind she brought him into the world, raised him to be a fully grownhuman and has now written an entire book all about him, you'd imagine that Caspar Lee's mum Emily knows him pretty well at this point.

But the real question isdoes she know the last time he cried?Or what he'd say is his absolute favourite body part? (Oh,get yourfilthymind out of the gutter already)

Watch what happened when we challenged her to answer all those questions and many more below...

So what do you make of that? Drop us a tweet to @MTVUK to let us know, would ya.

Oh and don't forget that Caspar's shiny new book is out right now. Awooga.