dunno what it means, either.
i've been happily straight, and have never been intimate with a man, but occasionally i'll fantasize about it... had a g-f who'd whip out the anal dildo and use it on me, and we'd pretend it was the real deal... but the reality of it doesn't turn me on much... though if it was in the circumstances you described... don't know if i'd be able to say no.