I had my ears peirced at five. My grandma and great Aunt took me shopping and decided to get it done. I wanted earing like theirs. Then my brother and I were restling and one got pulled out and healed shut so I had to have it done again. I didn't mind and no body made me do it. I used to love wearing different earings every day. When I went to my first day of highschool my parents took me to get my cartlidge peirced. I had wanted it done so badly. It took three years for them to heal properly, but I love them.
I have had a tone of body peircings in my life too, started when i was 15. I also have a bunch of tattoos. My mom asks what I will do when ds asks to get peircings. I said I will take him to have them done if he is old enough to take care of them. If he asked for his ears peirced I would do it now because they are easier to care for, but tatts have to wait until he is 18 because you can't just get rid of them.
I don't see any problem with peircing a babies ears if that is what you want to do. My mom said she didn't do mine because she was worried about infection when I was tiny. I probably wouldn't do it, but if it is something cultural or what ever I would say go for it. It really isn't permanent. If I decided today that I wanted to take my earing out, even after all these years, I could and they would be pretty much gone. There is a big difference between ear peircings and circumcision. But that is just this Mammas opinion.
eta: I like the idea of ear peircings being a comeing of age thing as well. So personally I will probably wait until that time and do it as a special ritual. Like if I have a daughter I will wait till her first menses and take her to get her ears peirced and give her special moonstone earings. Kwim? But that is just my personal thing and I could change my mind at any time. LOL