Watching: I was leaving a female friend's place one night after some homework and drinking. As I was leaving, I had to walk by her bedroom window. Glanced out of the corner of my eye and saw her taking her shirt off. Needless to say, I watched the rest of that show.
Being watched: Fucked a girl doggy-style on my old apartment balcony once. We had a rather large apartment complex about 50 yards away, facing directly at my balcony. Not sure if anyone saw, but they would have had to be blind not to.