My mom had my ears pierced when I was 5. I didn't want earrings, but she really wanted me to have pierced ears for my kindergarten school pictures. I guess 5-year-olds don't get any say about their own bodies >.>
I haven worn earrings in over a decade, but the holes are still there. They still get infected sometimes and the last time I tried, I couldn't get an earring through, but yeah--the holes are still visible. I don't think they ever really go away.
I was at work one day and no one there knew my history, so they just took me at face value as a guy. One day, one of my older co-workers noticed my earring holes. Know what he said? "Whoa, you're a little rocker. You know, you can wear earrings to work, no one here will care." They didn't assume I grew up as a girl. They just thought I had a 'wild side'. Some of the younger guys who worked there had visible piercings (ears, eyebrows, snakebites, etc.). I don't think it's unusual any more for guys to have both ears pierced, especially if they are younger.