I was pierced on two occasions, and wear either one or two pairs of earrings, so it seems odd to me to think of them as four separate holes, since they don't have four separate identities, unlike, say, one set of ear piercings, a nose, a belly button, and something NSFW, which I'd think of as four, not five.

It may be moot anyway for me, since I haven't tried putting earrings into the second set in about two years now...