Hi there, I know the truth of what you say, but every so often I get proof positive in my own reactions to it. Last week, after spending all day looking after Brian and taking him to hospital, my thoracics were so tight I couldn't take a deep breath. Five or six puffs from my pipe had me breathing deeply again. Muscles relaxed, pain level lowered.
The proof is, as they say, in the pudding. Or chocolate.