I know how you feel. I have the same desire for lesbian porn and love to watch it with my husband. Unlike your husband, though, my guy gets turned on by the idea and says he would love to watch. I've never doen anyting with a girl, and not sure I ever will. But watching girl-girl porn just gets me so hot that I wonder if I could stop myself if the opportunity ever presented itself.....
How did u approach the subject with your husband? Was he already into it and you joined in? I would like to at least bring it up and see what he says but I'm not quite sure how to do it. Like I said, he's pretty conventional when it comes to sex. For example, when I first brought home a vibrator, he became jealous of it although he later learned to use it to his advantage and now he loves it.