I look because I am a voyeur, I get aroused by seeing the action it is so much fun!
Then, I close my eyes for a little while and enjoy what is happening, viewing in retrospect what I was just looking at.
Sometimes though, I close my eyes and barely open them because I noticed it intimidates some and since it's also about "his" pleasure (I can't believe I said ALSO!), I understand and respect that.
I also have my times where I get intimidated by someone staring at me.
I guess I prefer to look and have my partner's eyes closed.
NAH!!