Thanks for the replies. He just said he felt a weakness in my abdomenal wall, apparrently somewhere abeam Mr. Happy, when I coughed. I had previously thought of my abdomenal wall as one big weakness.
I cannot feel any obvious anomaly down there. I feel pretty ridiculous groping myself and coughing, though, and so have not searched much.
I guess there's nothing to do until such time as a serious rupture develops, which may or may not happen. It's too bad there are no exercises or other things to do to improve the situation.
If I needed an operation, I would be suspicious of mesh. There seem to be some dodgy types out there, and there are reports that this is one of those areas in which doctors tend to recommend the product of whichever medical device company has feted them best.
Thanks again.