Speaking of human-looking facial expressions, Comstock Films (the folks who made Marie & Jack) are casting for another production:

Comstock Films seeks real people in real relationships for sexually explicit documentary style films.

Comstock Films is launching a new project to produce a full-length film. We are looking for real-life lovers of all sexual persuasions who want to share their unique erotic nature with the world. This feature will be pansexual in nature, and we are especially interested in people and erotic practices not usually seen in mainstream porn. People of all ages, genders and transgenders, races, body-types and sexual interests are encouraged to apply!