Girls always seem to jump to 'not good enough for him' every time a guy mentions wanting to try something new. More likely than not yeah we might really want to do something, but it's just not important enough to have any weight on whether we want to be with someone unless the sex is bad or non-existent to begin with. Like I had a girl who absolutely refused to do anal, which I love, and sure it would have been nice but I asked her to marry me anyway, because not wanting to do a particular fetish just didn't matter enough to effect having great sex doing a bunch of other things or how much I loved her.
Or to put it into a drug analogy, I really really love opiates, and would never ever want to stop doing opiates, and it would make me sad if opiates thought they weren't good enough for me anymore just because LSD seems like a lot of fun and I really want to try it some day, but certainly wouldn't even consider breaking up with opiates if they said no (which ironically they do because they take all my free money lol)
And also you're never going to get away from the MFF issue because I don't think there's a guy on earth that's not going to try for that eventually. %)