Water
He kisses Spike, as the sky flows down around them.
The rain seems to saturate everything, colors and shapes and reasons running together like ink on damp paper. Xander's mind blurs around the edges, dissolving in the warm trickle of raindrops down the back of his shirt, the gentle pressure of cool fingers against the nape of his neck, the unexpected softness of lips against his own.
His eyelashes separate slowly, made heavy by fat droplets of water that roll haltingly down the creases of his eyelids. Stunned blue eyes meet his own, closer than they've ever been before- and as awareness creeps back he realizes that their lips are no longer touching, that the space between them has grown. One of them is pulling back, though for a moment he's not sure who, and then it doesn't seem to matter because it's over.
They spring apart as reality reasserts itself, panting with shock. Spike's eyes are still wide and unguarded as his hand automatically flies to his mouth, searching for residual heat. Xander breathes heavily, gulping air that is suddenly too thick with water and uncertainty.
Someone wavers.
Then they're moving together again in perfect synergy, and everything changes.
((A/N: Written on the fly, whilst avoiding an important term paper. Concrit and feedback give me feelings of self-worth, while also helping me improve my writing.))