My DS is the same. 100 times a day we have this conversation:
DS: Wahh (super put on with bottom lip out, arms crossed, curled in a ball)
Me: What's wrong DS?
DS: DS sad
Me: I can see that but why?
DS: Because Daddy came home/you sat there/DD looked at me
Me:

Or there's the no no no no no no thing

I'm attempting the food additives route but the time involved and lack of support from extended family is proving prohibitive. Hoping he grows out of it. DD is already showing similar tendancies.