I was reading the Jack/Daniel essay on Ship Manifesto this evening. I actually knew all of the slashy moments the poster mentioned. I can't decide if I should be worried about this or not. But one moment they mentioned I know I've seen before (it's from The Serpent's Venom for those who know episode titles better than me):

Jack gives him an affectionate Look, and then pushes up Daniel's glasses.

Now if someone did that to me I'd clock them one. Really. That is one of the most annoying things you can do to someone wearing glasses because it would leave a big finger smudge on the lens - in this case Jack has a finger on each lens - and then you can't see and need to wipe them. Okay, so sometimes people deliberately annoy those they fancy, but if someone I fancied did that to me, it really wouldn't endear them to me at all.