I have it. In all my life I never had any BM difficulties, until a couple years ago and a colonoscopy showed that it is a very bad case. I take a "gut relaxer" called Librax, and stool softeners every day and will take them forever (in the words of my GI dr.) I have found that stress has been a huge factor in this condition, for me. I'm not saying it would be for everybody. I have not had a problem with oily foods at all, although, we rarely eat fried foods because of my husband's condition... he has crohn's disease, which is basically the opposite of my problem, but stress is a major factor for him, also. We don't stress each other... it's just life around us. I do avoid seeds and nuts and I NEVER eat popcorn anymore. I do eat all veggies with the exception of corn, because of the little hard centers. I am at my best when life is good (aren't we all?!) and I drink LOTS of water, and other liquids, particularly tea. I do drink coffee occasionally, but it is dehydrating so it isn't an everyday thing for me.
Now, I'm sure that is more than anybody wants to know about me!