It's OK to ask....T won't laugh or reject you or think it's stupid you asked. This will him know what you need! But if it is hard to ask, you can change where you sit, maybe sit closer to where he sits, if he has a chair where he usually sits and a chair closer to him than where you usually sit? My T has her chair, a couple of small couches and a smaller chair, so I can vary where I sit. She knows now that I do like her to sit closer, so she does come sit closer to me....but she still usually asks me, out of respect for my own personal space boundary!