(One) Ear Lobe Piercing on a 4 yr old Boy?

My husband decided to pierce our 4 yr old son's left earlobe. My mother went balistic for a better word mind you she was born in 1949. But anyway back to the piercing, in your opinion do you think it's unconventional to pierce a 4 yr old's earlobe. Even my older sister who is like 29 said I should've waited or we shuld've waited until he was older. Do you think that an ear piercing on a BOY this young is bad or is it just up with the times?