We haven't really explored this too far due to safety and privacy concerns, but I'll certainly be pushing this on our next holiday.
We lived in an apartment in a busy city for a while, so my one story comes from there. It was a brand new apartment at the time, so it had been built to the latest standards and also to cover the reality that our country doesn't see too much sun over the course of a year. This meant that in our short period of summer, our apartment would get silly hot (like 28-30c indoors).
It wasn't unusual for us to be sat in our underwear. One evening we ordered pizza and it was my wifes 'turn' to answer the door. I thought nothing of it as she got up and walked to the door, because she would pass our bedroom and main bathroom on the way - plenty of opportunity to cover.
So as I say, I wasn't really paying much attention. She walks back in holding pizza and nonchalantly says "I don't think he was expecting to see that much skin...".
Confused, I turn away from the TV and look at her and slowly realise what had just happened. I probably got too excited... "What happened?!" "What did he say?!" "Did he check you out?!?!?!".
She said he was pretty speechless but was beaming and she found it funny that he was trying to maintain eye contact but his eyes kept wandering down.