A little bit fat

So Ninja went on a school trip yesterday to Twin Lakes fun park.  He wasn't in a particularly talky mood when he got back at 5pm and by the time dinner was over and cleared away he'd already taken himself off to bed and was fast asleep.  Not wanting to be a nag I didn't push him for details of his day at the fun park this morning, I'm sure he had a lovely time at anyway and I knew eventually he started to tell me about it.  He did but it wasn't what I was expecting bless him.  "Mummy, ***** sang a song on the way home about you being fat", he then proceed to give me a rendition. Right, exactly which way should I go with this one then ??? So firstly I took the, "well that's not a very nice thing to say" approach but that always comes across a bit of a cop out when I hear people saying it to their children so I decided to tackle it another way.  I asked him if it upset him, to which he said it did, it had made him cry a bit and he'd also told another friends mum. The friends mum had had words with them both but Ninja still felt a little bit sore about it all.  So then I said I wasn't upset about it and it is a bit true anyway so what does it matter. Then I asked Ninja if it made me a nice person what I looked like and he said "no, and anyway I like you soft and squidgy to cuddle, I wouldn't like it if you were all hard and bony" and with that we decided that actually it didn't matter what someone said about me or himself its what we thought of ourselves that matters and that as long as we treat each other right we will always be a happy family. I also said that next time someone says something like that about me that he should just tell them, that is why my mummy is the best mummy in the world lol