Only people who are scared use riddles
Hmm, quite doubtful, my psychology course didn`t say anything about it. However, it said that exposing people to riddles is a good way of checking their intelligence and general aptitude. :)
E.g, Rich, tell us, why does the chicken cross the road/path/country lane?
Quite sure about that, paw?
Ok ,after brainstorming other options, it is also possible he tried to be humorously provocative.