The first two are the most frequently used.
Hey, I look at a lot of porn, so surprising, I KNOW.
Here is one of my absolute favorite porn tumblrs at which I have used all of these faces (No shit, it is so dirty and amazing you guys):
http://derekisme.tumblr.com

Hubba hubba.
Also, I’m experimenting with coloring comics, I used to not have any time for such decadence with my auto bio strips but maybe there will be more of this in my future.