There are few other franchises so thoroughly inundated with such moments, I think.) It is the moment when you try, you genuinely, seriously try to take off your slash goggles and figure out what the writers, producers, directors, and actors thought was happening in a scene, and you can only conclude that, no, they must have thought the same-sex pairing was doing it, too. (It can also be the moment that a non-slasher wanders in, studies the screen for a long moment with narrowed eyes, and then says, "They are so fucking each other."

As far as I can tell, there are two major categories of No Heterosexual Explanation Moments. The first is where the plot only makes sense if the pairing is, in fact, a pairing.
... And the second kind is where it's just not something people with a strictly platonic, UST-free relationship ever do.