Most of the time men do not show any symptoms of having HPV. Lucky us! It is rare that men will have a wart, but KitKat is right, if they do, the wart can be tested. I'm not sure how either though. I'm sure it would be a procedure your BF would just *love* to have done.
Meg, 26, 1a1 cervical adenocarcinoma, cone 12/12/05, 2nd cone/pelvic lymphadenectomy 3/1/06, NED
From what I gather they take a scrapping from the wart that is on their privates however, any doctor would probably be able to identify a wart by looking at it and can automatically say its HPV since a wart is present.