A man visits his friend. The friend pours two drinks and they sit down on the balcony to watch the sun set. After the last rays of the setting sun finally disappear, the man turns to his friend and says: “Cheers!” His friend turns to him and scolds: “Did you come her to drink or to talk?”

Historical note: I heard Ulf Hannerz tell this joke at the fourth ConsumAsiaN conference in Hong Kong, April 22-25, 1998. Only instead of two friends the protagonists were a Swede and a Finn, with the punchline delivered by the Finn.

A man visits his friend. The friend pours two drinks and they sit down on the balcony to watch the sun set. After the last rays of the setting sun finally disappear, the man turns to his friend and says: “Cheers!” His friend turns to him and scolds: “Did you come her to drink or to talk?”

Regarding whether or not to be explicit about your expectations: I think the lesson from the anthropology and education literature is that students from well-to-do backgrounds are more likely to know the hidden expectations of classroom behavior, so making everything as explicit as possible about your expectations will help to even the playing field for those students who might be smart, but less well socialized into the system.