I love to turn off the A/C and open the windows! Even though we have a filter system on the unit, I still think the house smells stale.
Funniest thing to me was last week my 4 year old GD was sitting in the bathroom doing her thing, window open, and she says "listen Grams. Hear that bird? It must be a blue jay or a hawk." Wow, you must have been talking to your Granpa!