I agree with Squirrley here, but I also agree with the guys. It's a guy/girl thing. Different gender=different perspective. Having my guy watch, or look at porn doesn't bother me, but I know a lot of girls that ARE bothered by it. I guess they feel, "why does he need it when he has me?" I can understand that, but I can also understand the guys point of view too. You need to find a compromise that will keep you both happy.
However, as for your relationship with this particular girl, I don't know why a 22 year old would run to her parents with information like this. Sounds very immature to me. If she can't handle it, that's one thing, but involving her parents is just wrong. This is an issue that you two should have handled alone. It's almost like inviting them into your bedroom.