My guess is that airplanes are cool/fascinating for a lot of people. Aerospace is a field where a lot of things are unknown to most of the population, which triggers curiosity even for the smallest details.

I have done IT consulting in the field, and have been genuinely happy to get a tour of some facilities and debugging software while sitting in a life-size simulator. It really tickles your engineering senses.

I haven't noticed it personally. Are you getting aeronautic stuff elsewhere too?