Well, from my tongue's experience when dealing with chicks with piercings, they don't really make anything better. If it's on the tongue, their breath stinks like sewage after a few kisses or after having sex. If it's on the lip it's hard not to pull it when kissing, and if pulled it hurts. If it's on the nipples is the same thing. I've never had the uh, privilegue of having sex with a chick with her clit pierced, and i really hope i never come across one of these uh, artisanal females. Sure, these kinds of piercings do look exotic and enticing, but other than the looks it usually has more cons than pros. At least in my case.
I don't mind piercings on the eyebrows or nose, these usually never get in the way.