Rhetana, this is my theory on IBS/D. IBS is for me a brain/gut nerve motility disorder. I can experience instantaneous D with enough anxiety. Just as the brain regulates other functions ; heart, breathing,etc. Anxiety also causes these functions to respond wrong ; palpitations, hyperventilation,etc. I believe that some of us are more sensitive to our thoughts and brain perceptions because of our genetics. I had a P/Doc who was positive that anyone can experience anxiety caused IBS/D with sufficient stress. He said that when he took his MD college exams almost everyone ran straight to the toilet upon leaving the exam room. Lotronex, a drug that slows gut motility stopped my IBS/D completely on the first dose, and this was after 30yrs of trying nearly everything. Some other things helped but not nearly enough. Many of my family members also have IBS/D, I once had a MD that thought it was mental and we all learned it from each other but there was never that kind of personal interaction in our case. Besides, I told you Lotronex worked and nothing else did. If is just mental to where others can acquire it from example, just about any med or placebo would produce results. I don't believe it is a disease but a disorder, it can't be transmitted. That is assuming you don't have "Bacterial Overgrowth" in your gut. This is a new theory and I don't know enough about it. I do know that I have been prescribed strong antibiotics several times over these 30yrs for other problems. If it was "BO" for me it should have been stopped.Norb