It's oddly tempting.
Lessee--technically, six fandoms
Star Trek: Voyager
Tom Paris/B'Elanna Torres
Tom Paris/Katherine Janeway
Tom Paris/Seven of Nine
Tom Paris/Harry Kim (sort of)
B'Elanna/Harry Kim (sort of)
B'Elanna/Chakotay (sort of)
Tom Paris/B'Elanna Torres/Neelix (very technically)
Katherine Janeway/Seven of Nine
Harry Kim/Seven of Nine (technically)
X-Men the Movie
Technicalities: Logan/Scott (incomplete, unposted), Rogue/Mystique (implied in prequel written by another author), Not Unspoken Round Robin (everyone was implied somewhere somehow at least), L & L (in theory, a lot of people had a lot of sex with each other)
Lex/Peter Parker (crossover)
Queer as Folk
I really seem to be dropping in my variations on a theme here. Huh.
*squints* That was kind of scary.
Okay, just a little longer.
I don't like using state computers. It makes me nervous.
Edited to add:
Forgot to add Scott/Gambit, written but never ever posted, for really, *really* good reason. Not one of my saner moments, really.