http://www.sugarquill.net/read.php?storyid=656&chapno=1 This is a pretty detailed guide to Harry Potter fanfiction. (I love these things.)
EXAMPLE.
Smells: In HPFH, food and certain people can be expected to reliably have a smell. The odor of food is completely uninteresting to any save those tourists who can be enthralled by the cuisine. But the scent of certain Potterians is vitally important to the adequate appreciation of the tour. Fortunately or unfortunately you will have to get very close or turn into Remus Lupin to take in the full effect. Thus, after you have rubbed your face against Severus Snape’s chest, you will be agreeably surprised by his spicy, piney, or resinous scent. And male tourists should not pass up the chance of burying their face in Hermione Granger’s hair, as they will be assailed with the smell of vanilla, strawberries, apples or violets. Harry Potter, upon returning from Quidditch practice, will smell sweaty, but in a charming way. This is probably one of his more amazing abilities. See Severus Snape/Hermione Granger, Severus Snape/Original Character, Draco Malfoy/Hermione Granger, Harry Potter/Ginny Weasley, and Ron Weasley/Hermione Granger.
They sure did their research. I suppose it should make me sad that I understand the inside jokes. It's out of date, but it still makes me smile.
Nah.