Five senses: part four : Smell.
The smell of rain always reminded Castiel of his first time with Dean Winchester.
The rain had poured from the skies, bouncing in huge droplets from every surface, pattering against the leaves above them, making each and every one shiver against the branches of the tree they were standing under. Although the foliage went some way to provide shelter for the kissing pair, they were both still getting wet, droplets of rain slowly bouncing off their shoulders, dampening their coats, but neither minded. They both were too far lost in their kisses to take any notice.
Castiel groaned against the feel of Dean against him, providing warmth against the chill in the air, warm body pressing damp clothes to Castiel's own chest, and his full lips parted when he felt Dean's hand rubbing at the angel's erection, bucking into Dean's waiting palm; eyes still closed, lips still parted, tongue peeking out every so often as the angel moaned, and licked his lips almost nervously.
The smell of rain wrapped around them in it's cold and unforgiving embrace, and mingled in with the damp and watery smell was the scent of ozone, threatening storms on their way, and fainter still, beneath rain and ozone came the scent of roses and fragrant cherry blossom The myriad scents wrapped around them both, making their first time seem more sensuous somehow, more pure, cleansed free of anything but love, peace, beauty.
Castiel gave himself up to Dean, enjoying the feel of the hunter thrusting into his body with small grunts of satisfaction, wrapped in the scents around them, before Castiel came, releasing himself upon the tree before him.
He came down from waves of bliss, eyes opening slowly, a smile touching kiss swollen, parted lips, as the smell of rain and cherry blossom ingrained itself into his perfect memory, forever associated with this most precious of moments, forever cherished, never forgotten.