this is so so true! I´m both IBS/shy bowel sufferer and it´s exactly like you say - one day without having a BM is hell for me. I didn´t really realise I had a shy bowel - I mean, usually when I had to go somewhere I´d be constipated the first days but most of the time I would adjust to the enviromnent after a few days and would be able to relax and have a BM.
But then I went off to college and that´s when the real pain in the arse started. Last year I shared a bathroom with 5 other girls, which might seem like a good ratio - but the truth is, we had a broken door and you could hear everything that was going on in the bathroom, there was no privacy at all. I spent the whole weeks constipated and in pain - it was just horrible, and at the weekends I ran home to have a BM.
If it wasn´t for this horrible IBS/shy bowel, I´d be having the time of my life, I had great roommates, nice friends in the dorms, we had lots of fun, but I spent most days in pain thinking when I´d finally be able to have a BM.
Well, this year I share a bathroom with only one roommate, but she´s a weirdo - she hardly ever talks to me, she´s a clean freak and I´m better off when I don´t see her at all ... I feel like I´m wasting the years that were supposed to be the best part of my life because of conditions that I can´t control