The mutual understanding of a chronically ill friendship.
My best friend and I are both chronically ill. Different illnesses, but lots of similar symptoms/issues. One of which being gastric issues. My best friend was staying over at my house the other day, and she said "oh my stomach is doing things" so she wandered off to the bathroom, and as she went in she turned on the extractor fan saying "whack this on for politeness". I retorted with "girl you know that if I heard a plop, I'd be clapping and cheering for you". To a non chronically ill person, celebrating bowel movements may seem very strange to say the least, but in a friendship where you both have gastric issues, a bowel movement is a win.