Not sure is this is what you are looking for.... but check out this website
http://www.comstockfilms.com/main.html
Supposedly.... it is real couples... doing real sex... and talking about their relationships.
Not sure that it is to much on the instructional side.... but it isn't the cheap acting porn
stuff.
Supposedly the wives will enjoy these videos more... because it is more natural and sensual
and not the slam bam thank you maam of the porn stuff.
Just a thought..... check it out.
Kyle