Two drabbles.
First is H/D but it's sort of abstract. 75 words.
Boys as particles, as minute pieces of the universe drifting unpertrubed in the ether. They are the smallest, purest formes, self-contained systems.
Heat, friction, kinetic, add it, force it. Collision. May as well be atoms, may as well be people, may as well be planets. Somthing exploding against secret corridors and stone walls.
Polar attraction, chemical bonding. Chemistry was never a class at Hogwarts. But in some ways Harry and Draco educated themselves.
This one is Lily/Narcissa. 85 words. Nothing graphic.
If the woman could see the future, maybe her fine strong hands wouldn't be twisting through that sea of white-gold. Maybe she wouldn't be longing for the milk of skin, draping over her like a soft cloak. Maybe Lily Evans wouldn't be forcing kisses out of those impossibly soft lips.
As it was, however, Lily didn't know her part to play in the tale of our present. And at the moment of impact, the story told in Narcissa's sighs was all that mattered.