I was so stunned when I accidentally saw my girlfriend shaving her face
What did you think about seeing her like that?
I was aroused because I couldn't believe it was actually my girlfriend's face.
It's unavoidable that we will see all sorts of things when we live with each other. It's an unfortunate accident that you saw her like that, but at least you got aroused from it.
I'm afraid that might hurt her so I stay away from her when I get turned on like that
That sounds like something you might want to see a therapist about. It's good that you seem to have it under control for now, but what might happen if you lose control?