I have circled back to talking about touch every six months or so. Usually it's about certain experiences and relationships from the past as well as how I feel and what I want. I think working through whatever thoughts and feelings you have about touch might get you to where you can feel comfortable asking your therapist about it directly, if that's something you want to do. Plus obviously there is the added bonus that working through your "stuff" around touch might get you to a place where you can get your touch needs met from other people in your life.