"They are hard, round, covered by a scar and ugly up close."
Friends, it all depends on the skill of the surgeon. Uh,, let's not get into how I know what I know, but I am here to tell you that some of those jobs are very nearly undetectable, both to sight and touch. I have knowledge of three jobs that you have to look VERY CLOSELY AND UNDERNEATH to see any scar at all, and even then it's hard to detect because it's hidden in a natural crease line. The only other thing I will have to say about this is that I acquired this knowledge perfectly innocently, thank you.
