Done properly, nose rings and other facial piercings are fairly low-risk. As for guys and nose rings, it is entirely up to the man. They look good on pretty much anyone. Some very weak dudebros may mock them, but piercings are not gender-specific.
One may also ask, are girls with nose piercings more attractive?
Yes of course. The nose ring is that thing which adds extra beauty to a particular lady. It provides an extra additive to attraction. The lady wearing nose ring not only looks attractive but also display a bold character.
Some say, if you are a guy, you need to pierce your left nostril and girls pierce their right nostril.