My wife's position on this subject is exactly the same as yours. Her eyes remain closed when the bull inseminates her, but her mouth is open to moan, to urge the bull to put his baby in her and give the bull a passionate kiss.My eyes are open when I'm sucking cock. I like to look up at him then. Also open when he's fucking me as I like seeing his cock going in and out of me as well as see his facial expressions.
Eyes closed when we're in the heat of the moment and hard fucking and cumming. I love the intensity of the moment and can enjoy it more fully with my eyes closed. My mouth is usually open then though.