Disclaimer: Harry Potter and affiliates belong to Miss J.K. "Richer than the Queen" Rowling, not me. (Oh, but think of all the shoes!)
Author's Note: Ink was written before official word came out as to Blaise's gender (though I always maintained that he was a boy; this was written somewhere along the sidelines). That said, my apologies for the uncanonness of female!Blaise, (but hey, I finally wrote a story that's not slash).
Ron often compared dating Blaise to navigating his way through a pit of snakes. Some days, he was lucky and the thousand serpents were asleep, making his passage safe. Other times, they would writhe their way around his ankles and slither up his legs, tripping him and causing him to fall hard into the middle of the unforgiving Slytherin ranks. In these cases, Ron found that only his inner fire could keep them at bay as they hissed and weaved their way through a dangerously seductive dance.
And Ron often suspected that it was this fiery defiance that drew Blaise to him in the first place. She had a dark, frightening fascination for flames, continuously running her fingers through a burning candle then brushing those same fingers across Ron's skin, leaving hot trails on flesh that wasn't exactly cold to begin with. Blaise was the only Slytherin who couldn't be compared to a snake, because she floated and moved like a shadow or incubus, with cascading black hair and fatal black eyes. When they had sex, Blaise became as intangible as air, covering Ron entirely and blurring his vision from exquisite pleasure.
Ron often found himself pouring water through his hands and thinking of Blaise. She was liquid and he could never properly catch hold of her. It made him wonder if all evil was like this, slipping past you silently in the night only to wake you later when you realize you've been possessed. So Ron chased the thread of breathless whispers to the feet of the Dark Lord, where he felt for the first time what it was like to be the watcher toying with its victim in dark alleyways or seedy bars, and it felt liberating.
Ron often wondered what it would have been like remaining by Harry's side, but then he saw Blaise slid smoothly into the bed beside him and decided he didn't care.