I am in the same boat as your girlfriend- I'm a chick and I don't like porn. I actually throw a fit when my husband surfs throught the adult softcore channels on TV.
Yet somehow when it comes to work, I really don't mind what I do and if my husband did the same I wouldn't mind it either. As long as she understands that you're not looking at to make yourself horny all the time and that it is just part of your job (=making money) you should be fine. So be honest and show her exactly what you do. It might be wierd for her at first, but I think she would still be cool about it. No promises though!
Good luck!
~~Alli
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Allison
Marketing & Public Relations
TopBucks.com/TopCash.com
[email protected]