Hi OK - I don't understand your second question. As to your first - no, few people irrigate (and colostomies only). My WOCN told me in the long ago past, before throwaway products, EVERYONE with colostomy was taught to irrigate. Now with disposable products, few people WANT to learn and I think the ostomy product companies actually discourage it (they sell fewer pouches!)
A person must have the ostomy placed in the descending or sigmoid colon. The idea behind irrigating is to TRAIN the bowel to let down at a certain time of day (just like pre-ostomy). But you can sort of train your large bowel without irrigating - I did with my first colostomy in 2003.
I took an Immodium every day, which helped thicken the stool, and had the side benefit of regulating my movements to 6 AM, noon, and 6 PM - very regular. I also didn't eat much fiber at that time either. My colostomy back then was in the TRANSVERSE colon.
Good luck to you, whatever you decide to do!