Yeah that's what I'm thinking MadB.

It's also coincided with starting solids so he's gotten two teeth and started having food and sometimes I think he wants the comfort of boobie but then realises he's not hungry so just plays instead. He does tend to get this cheeky little grin in before he bites. When I go "no biting" he just snipes and giggles at me. How can you be cranky with that