Why do some people have bellybuttons that are apparently stuffed with skin, while some people have bellybuttons that are, for the most part, hollow?
This is a question that has been on my mind for around three years. I have a hollow bellybutton, but when I go swimming with my friends I notice that some of them have bellybuttons that appear to be stuffed with skin and are not at the least bit hollow. Why is that?
Thanks in advance.