Taboo (1980) claims to be the best selling adult film of all time. It was produced and directed by Kirdy Stevens and spawned at least 7 sequels that I know of. It stars Kay Parker as a recently separated mother of a 19 year old son.
breasts, bush, butt
Kay busts out her heavy-hanging hooterage and dense lap-forest in a full frontal plus special bonus buns as she gets slippery in a shower, much to the thrill of a peeping Tom. (49 seconds)