What do wiccans believe in?

my grandparents call me a wiccan all the time just because of my piercings (belly button, industrial, cartiledge, ears guaged to 00g, and i want a lip piercing). ive looked up alot of articals on their beliefs but all it tells me is that they have a god and a godess and they go by the quarters of the moon. I believe in God our Lord and Savior. Ive been baptised, I go to church every Sunday with my family. I do have a style i guess. Im scene....i guess. i have alot of friends and im out going and funny. i love being around people. i dont look wicken what so ever. so do they belive in piercings and tattoos?