Do you know the name of some of those sites man. I love the aspect of facial expression in porn, especially when they are "shocked" on a man's size.There are some websites that are devoted only to facial images of women having sex.
Look at some of the pics here and you can see the truth that faces don't like when fucking. Expressions tell the tale if the gal is being thrilled or not. Or beyond thrilled if she is getting fucked into the next world!