My T does this. One time I played with him a bit to test my theory - I crossed my legs, he crossed his. I uncrossed them, he uncrossed his. I crossed my arms, he crossed his. I slouched down on the couch and he did the same. It was so funny!!
One day I laid down sideways on the couch with my head tilted over and he tried to tilt his head the same way but he has a chair! I almost lost it laughing if I wasn't hurting so much inside !!! T tries hard - I will give him that!