There is plenty of slash fiction written and drawn about Loki online.
Seriously, you don't have to look far.
A simple google search reveals stacks.
And much of it about Loki and Thor.
But it seems in the Marvel Universe, in the new Loki: Agent Of Asgard, not only do we open with a shower scene, but we get this revelation.
Yeah, anyone thinking that we'd be losing Kieron Gillen's Loki, just because Al Ewing is writing the new comic, needn't worry too much…. but be careful how far this sort of thing travels. Take today's Adventure Time FlipSide #2, as an example.