Not sure whether to develop this into a proper story. Just been playing about with tidbits to amuse myself...
Ron cast another unsuccessful engorgio on his flaccid and less than ample penis. He sighed. He knew this would never be enough to satisfy Hermione. Particularly as he'd seen the way she licked her lips at the outline of Harry's sizable snake in his too tight school trousers. The bloody thing was almost knee length for christ sake! He knew that his package was enough to satisfy the tiny vaginas of the resident house elves, but just once he wished to satisfy a real woman... Hell Ginny probably had a bigger cock than he did. She certainly had more balls! She'd been pursuing Harry for months with no success. Ron suspected that Harry was balls deep in Hermione when no one was around, but his sister was certainly a tryer.
some weeks later...
Ron trembled as he crept across the silent dormitory. He kept his movements as cautious and quiet as possible, it would not do to be caught at this late stage in the game. After all, the potion was ready and he was at the final hurdle, he just needed to obtain the last ingredient. As he approached Harry's bed he heard the faint sounds of Harry's breathing and felt confident enough to step forward. He raised the scissors and gently snipped a lock of unruly hair. Success he thought. Finally he would know what it would be like to be the chosen one with the python in his pants. He couldn't wait to run his fingers over Harry's massive cock. He'd always envied Harry this above all his other accomplishments. Ron felt himself harden as he thought of the delicious things he could do while being Harry. He knew that Neville had always had a thing for Harry and he'd heard some rumours about Neville's impressive oral skills. Soon he would get to look at Neville's sweet face as he unknowingly sucked his cock. Ron smiled and couldn't help but grip his length in response to his fantasy. He suddenly heard the sounds of rustling bedding, only to hear the voice of Seamus, "is this a private show or can anyone join in?"