It's not unusual to be asked about details of the shoot experience - how long? where was the light? etc. Always happy to answer with detail (this shot took about 10 minutes & there were 2 lights, a softbox close in on the left and another, more distant, to the right) it's important also to remind those interested that you keep in your armoury a list of proven set ups that you can quickly deploy when needed. That way you capture your subject quickly and let them get back to work.