A Punny thing I heard today

I was shopping in Tesco earlier today and a child went running up to her mum with a copy of bee movie and said "I found one! Can I get it". Seeing as we were in the film section I assume she meant she had found a film she wanted to watch. 

The mum then sighed really loudly and said... Oh behave. ....

BEE HAVE I looked up like yyeeaahhh, but no. She didn't even know she had said it! 

        Bee have, pure genius and she didn't even know it.