There's a philosopher and a sociologist at a nudist beach. The sociologist turns to the philosopher, "I assume you've read Marx?". "Yes" replies the philosopher, "...must have been those wicker chairs".
I must admit i'm a bit sceptical of reading too much into such signs unless that is one already knows something of the person and their normal behaviour. Taking a slightly longer view however, i find that the best way to tell whether someone is genuinely interested in me as opposed to merely...