my girlfriend has hers, but she only uses super basic rings, just a small silver ball type. i think its really hot, and i was against it in the first place.
also i had an ex who would wear super trashy ones, it was gross. she had one that was dice dangling and would joke about how it was trashy but still would wear it in public and shit. what a whore.
a simple silver ball ring is fine, other than that no. its really the same as nose rings, keep it small and clean and it will probably look okay.