I just slept with a girl with a belly button ring. It looks cute, she also had tanned and on her left hip had a heart shape. When she would tan she would put a sticker on that same spot so it would remain white meanwhile her body was tan.
I don't get the point of them...people will only see them during the summer when you're in your bikini, so I don't think the chance of it getting infected is really worth it. That is unless you wear things that show the world your belly all of the time, and that kind of makes me think they crave the attention too much. So I'd say nay..