Update to the list of words he knows: bonk (for several months, and I think I haven’t noted this, he’s been responding to a prompt of “bonk” if you hold your head close to his and say it – he gives you a little affectionate head butt or bonk.), ear, nose (he’ll often put his hand on either if you say the word) bite (usually as in don’t bite me hard.. I think I haven’t noted this, but he often bites into the back of mom’s neck or shoulder like a little vampire when he hugs her, or he used to but doesn’t much now because he knows mom doesn’t like it).