Yeah that's why I said it's questionable, because 'slash' means different things to different people. To me it's anything m/m or f/f, though I usually specify the latter as femslash. To others it's a specific kind of gay, much as yaoi is, and I'm not a "slash fangirl", I just have a beloved and favourite character who's gay, and one of my pet interests is the whimsy and fluidity of human sexuality.
We had fun in an RPG today with sexuality. My girl was being incredibly open and honest about the fact that she finds basically everyone attractive. One of her friends is still denying quite loudly that he's gay. Two straight boys leapt at the chance for a threesome (m/f/f implied) with her so she said it was a brilliant idea and tried to wrangle it with her and both of them (m/m/f, neither of them went for that idea...). We were all basically sitting there cracking up for two or three hours, but underneath how funny it got, there were actually some really interesting interactions going on.
And Demelza's this really political, feminist.... champion of equality etc and ended up in this big conversation about, fuck... schoolyard bullying and people's obsessions with each other's sex lives and how it tied in to society's prejudices, and how sexuality changes, and how lust should be honest rather than repressed and put in boxes and labeled. It was very, very fun. That's one of the things I love about RP, when I can use it to explore ideas. I love ideas, I'm all about ideas.