Do lots of guys do this?

Oh ya, we love to watch ur sweet patch, as well as the look on ur face when you cum, and the spasms of ur pussy. Not sure about other guys but I love to see a girl watching my rod as she strokes it, and/or blows in anticipation of the facewash jizz that is on the way.. that's quite hot.. for me.

I look sometimes. Yes, it's a turn on. Why? You could call it 'home made live porn' Nothing wrong with that.
No vibrator.

Yes... I have noticed my guy do it when he fingers me... but I think is just because its a turn on to see a woman getting pleasure... you know we make faces and it looks hot ... they are seeing us vulnerable at that point... its a huge turn on!

ya, if we aren't making out while he's doing it, then he usually looks. but I look when I give him a hj too, like jacquesvol said, homemade live porn.

my boyfriend does this too. yes, it's a turn on to see us being pleasured by them. hope this helped :)