As the nights draw in, and summertime evening frolics become less feasible, our students, no doubt, are turning to more cerebral means to pass the evening hours. One way might be to consider the paradox at http://peasoup.typepad.com/peasoup/2009/10/smilanskys-nonpunishment-paradox.html which I thought interesting.
PEAsoup is good blog, which often has things of note on it - but I thought this, albeit drawn from a book (by Saul Smilansky) - was worth pointing out. I won't explain more - in the name of maintaining the suspense till you get to the actual site...
Best enjoyed in a leather armchair, with sherry and a cat while looking out at the quickening dark of the Cotswolds (or not).