I didn't learn until several years ago the bumps lining the base of mine had a name - pearly papules. I asked the Internet about them and found rather disturbing pictures and information suggesting they can be "corrected." I'd never want them corrected. In case anyone ever asked, I was prepared to describe them as combination French-tickler fingers and taste buds.

Looking at one of headlover2's pictures in full size, it occurred to me there could be a "barbs" purpose to pearly papules. Perhaps they helped keep our lovers from escaping until we'd pumped them full of our seed.