If you wan smash, smash. Vitiligo is not contagious. You cannot catch it from another person through touch, sharing clothes, eating together, kissing, sex, or any kind of contact.
Vitiligo happens when the cells that produce skin color (melanin) stop working properly. It is mostly caused by autoimmune reactions, genetic factors, or sometimes stress or injuries to the skin. So it has nothing to do with infection or germs.