I love lip piercings on girls, not so much eye brow though. I had an eye brow piercing that I did myself (I wouldn't recommend doing it that way) and it healed over just fine same with my lip, just a tiny dot that kinda looks like a freckle .
Risks? Nerve damage. You gotta be careful when stickin your face its packed full of nerves
I thinks of them as metal moles. My best female friend has one on eyebrow, she thinks it's cute. I've never criticized her (it's not my place) but when she actually asked for my opinion I said: "You payed a guy to hurt your face and give a metal mole".
well it all depends on who the girl and if it fits her style. you can always experiment to see what works best for you. the most that can happen if you don't like it just take it out and put alcohol on it. it will heal up. no worries. I had gauges b4 and they healed up well. you wouldn't even know I had 'em
Girls can rock piercings just as well as the guys! I have a ton of piercing and if you go to a professional to have it done & clean it properly, there really isn't much risk for anything to go wrong. As for my piercings there isn't scarring any worst than a dot. In my opinion it is well worth the tiny dot of a scar. I love my piercing and can't imagine not having them :)