Just some food for thought for you boys...
some STI'S (INCLUDING HIV) can remain dormant in your body for years. She might not know she has HPV (or HIV) at the time you all start having sex, but it might manifest itself within a year or so. HIV especially can remain dormant in your body for 10-20 years.
Also, HPV can't be tested in guys...so you might have it and not even know it and give it to her. And the more serious strains can cause cervical cancer. Although, you probably wont care, cuz you probably don't plan on being with her that long, right?
So what'd we learn? Just because you've been tested, doesn't mean you're in the clear...wrap your fucking slong.