A Portrait of Seduction (1976)

A young horny and gifted-in-many-ways man plans a career as an artist. He gets his homework done with the assistance of some of the most beautiful models ever seen. Each night is an orgy of new sexual pleasures, a deeply satisfying erotic ballgame that throbs deep into the night. The passion is often so intense that other members of his studio join the action. 

The Affairs of Janice (1976)

Starring: C.J. Laing, Ras Kean, Crystal Sync, Zebedy Colt, Renee Sanz

Colt's amazing thriller combines references to old Hollywood movies, psychosexual unhingement, and audacious sex scenes! Zebedy is a painter whose alcohol-soured marriage is livened by continuous cocktail parties and often kinky and terminal indiscretions!
Uniquely talented as a director and actor, Zebedy Colt could turn a low budget skin flick into a hyper real and sometimes vicious experience. In front of the camera, Colt could perform roles from meek to depraved, and as a director what he delivered was always erotic.

Teenage Twins (1976)

Starring: Brooke Young, Taylor Young, Tina Von Davis, Eric Edwards, Leo Lovelace

Twin girl are thought to be the work of the devil. Teenage Twins brings an answer, and explores this belief on every angle.

The twin sister, Prudence and Hope (Brooke and Taylor Young), connected by a mysterious link, are consumed by the same desires. Simultaneously, they share experiences and pleasures, although they are miles away from each other.

Teenage Twins will transport you to a land where every caress is multiplied by the magic number two. The chemistry between the twin sisters will captivate your senses, as Prudence and Hope become the centerpieces of a mysterious sexual ritual. Teenage Twins is a guaranteed magical experience. 

Teenage Massage Parlor (1976)

Starring: Debra Sue Mullins, Hilda Von Krause, Susan Ingersol, Yvonne Tobarelli, Vivian Zentar, John V. Maguire, Lester Hopmeier, Peter Eldridge

Porn film from director Ray Dennis Steckler takes place in, as the title suggests, a massage parlor where the teenage girls are doing more than just rubbing backs. Considering Steckler wrote this and considering it's a porn from the 70's, needless to say there's really not too much plot going on here.