Weird thing to be stubborn about

Megan

My son can reach and say 'tuh' or 'touch' (on his own, or when asked), he can say 'mom', but when he wants to be picked and he desperately try to get him to say up, or say mom, or say ANYthing when asking to be picked up but he very deliberately refuses to speak! He just makes little noises, or reaches really hard, or sometimes screams. We can tell that he's specifically refusing to speak (in this one circumstance). What the hell??