googley, I do really understand the fear. I have said mine out loud a number of times, but they still lurk. In the middle of a decent session last week, I blurted out "You must think that the things I talk about are idiotic!" It just came out, and surprised me and scared me. I think it was in response to a look that I interpretted/projected onto.
I get the worry about wasting time too. Nothing feels more awful than to feel like a session dwindled away without it going where we wished it to go. It makes sense to want to avoid that