Ears are pretty tame now, in comparison with lots of other piercings! This is why also I think that ear piercing is not necessarily about rebellion; if a young guy's dad has earring, then how can he be rebelling against his parents if he gets earrings also? (if this makes sense?)
These days guys do both ears, usually, right? (It probably stems from the fact that so many sisters and moms started getting at least 2 ear piercings in each ear, which made the idea of a guy not even having 1 on 1 side a bit unfair...)
It's pretty benign, really, I think.