I think that your comfort object isn't hurtful to you or anyone else, therefore there is no medical reason why you should come forward and share this intimate information with your T. There isn't any major reason not to share either though. Whatever YOU feel comfortable & safe with is what's best for you, in this situation.

We have our tools, to help us get through the very dark times. Some tools aren't real healthy either ~ and that's when we have a good reason to get back in charge of regulating our emotions in a healthy way. There is nothing harmful in your emotional regulation tool...so, Kudos! to you.