Yes, people with pierced nipples can experience nipple orgasms. In fact, it is said that people with pierced nipples have a higher chance of experiencing a nipple orgasm than someone who doesn’t have their nipples pierced.
Since nipples are a bundle of nerve endings, a nipple piercing being in constant touch with the nipple itself can be arousing. Individuals with pierced nipples like to have their nipples flicked, licked, or massaged. However, this can vary from person to person; always remember to communicate likes and dislikes when indulging in any form of sexual activity.