*raising hand* I was bi-curious for several years but did nothing about it. Afraid? Didn't know where to start? At times I have literally ached for a woman's touch. My partner-in-life and I talked about it though, and he said that if I ever had the opportunity to be with a woman he would never see it as cheating (whatta great guy I have, and not just for this reason!) I do not believe for a second that a curiosity about being with a woman is a sign of something lacking in a marriage.
By now I hope you are no longer feeling freakish about it. As mentioned before, our culture treats same-sex interests as a taboo, but how dumb is that? My personal philosophy about marriage has evolved -- a lot -- over the years. My love and I are deeply committed to our marriage and each other. Exploring my curiosities and interests has brought us even closer as a couple. Your husband may not be interested in helping you explore this part of your sexuality . . . or he may very well get into it! The only way to know is to talk with him.
Is there a swinger's club in your area? This may be an excellent place to "break the ice," so to speak (did wonders for me!) From what I've seen, it's mostly couples at the club I have visited a couple of times. I understand there are some good online groups, like on Yahoo (I have not yet explored this though).
Please feel free to PM me if you wanna talk more