If you have a mac you can create an account specifically for visitors if they want to use your computer. I always do this when a chick wants to play around on my Mac, lock my account and log in the visitor which has none of my folders, links, Access to any programs I don't want them to use. I tried doing this same thing on a PC but it was much harder, not user-friendly... not sure how it is now with XP.
Like someone posted here before, women cannot be upset over the material seen here. I see far worst questions and answers in Cosmo and the like, hell women have had support from other women on every " Dear Gabby" type post in newspapers for years. Why is it such a crime for us to come together and try to better ourselves and for all intended purposes provide a excitement and entertainment for ourselves and those we are attracted to?
I had a GF once see my PC unlocked with all my porn links and downloads, when she asked about it I just asked her if she wanted to watch some of the stuff... and she did

You just have to know how to play that shit off and let it roll off your back. You are a man and need not make excuses for your desires.