I'm in school for counseling psychology and they train you not to ask "why" because to some people it sounds judgemental. They're more liekly to say, "tell me about that", "can you elaborate", etc. Therapists are trained a lot in proper wording of questions or statements. Before school I had no real idea how much the same basic conversation in meaning but with different wording will generate very different responses. Its useful in everyday life too.