Nice art, a left sided upper chest peice on a male and you were not expecting nipple? Common (Colloquial that is) (If you want exactness, come on) BTW fool, it's Your not YOU ARE. If YOU'RE going to criticize make sure YOUR english is good, fair enough?
I love the tattoo, and I accept the nipple! Don't think twice about criticism from someone who can't use the right spelling of "you're/your." Nice work and great placement :)