It's okay... don't feel stupid. A butt wound is when you have your rectum and anus removed, so you essentially have a hole/wound there that has to heal from the inside out. It happens when people have a proctocolectomy (colon and rectum removed) and can take months to fully heal. I hope that helps explain it.
Dx'd Crohn's in '99 at age 28. Proctocolectomy and permanent ileostomy in '06.
Disease-free and medicine-free since surgery and very thankful to be healthy again.