Have you read Marx?

Two old men, one a retired professor of psychology and the other a retired professor of history, were on a two-week stay at a vacation resort with their wives.  While the wives shopped in town, the two old men were sitting on the porch of the hotel watching the sun set on the horizon.

The history professor said to the psychology professor, “Have you read Marx?”

To which the professor of psychology replied, “Yes, I think it’s the wicker chairs.”