What do you mean he was miscast? Honestly, I think he was 100% perfect at playing a guy who's seventeen, been stuck at seventeen, and who's been a virgin that whole time. Plus I bet he's too polite to ever consider getting a prostitute to help him out with his ~problem, so he's been a virgin for how long?

(It's my headcanon that he's a frustrated virgin during all the books... Plus he lives with three other couples? Yeah... I think that Robert Pattinson was bloody brilliant at portraying this.) :3