Really interesting question. I would say at this point in time, women are far more likely to experiment than men, simply because it's more socially acceptable - encouraged, even - than it is for men to experiment.
But I think if you remove the societal attitudes from the equation, it becomes much more fifty-fifty. Humans are sexual creatures, we are wired to be sexual and as part of our sexuality many of both genders explore out of curiousity.

But at the moment society and culture says "Two women = good, two men = shocking and controversial".

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You know, Blackadder, for me socks are like sex. Tons of it about and I never seem to get any.

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