Unlike just about every other performer in existence, there really isn't much out there on the Web about this guy--Stan Ross. What little info I can find indicates he was still alive as of just a few years back. Looking, as I've written elsewhere, like Buster Keaton's demented brother, Ross was in show business for at least 2 and a half decades, appearing on TV opposite Jack Haley, Jackie Gleason (below from 1951) and Jonathan Winters, always looking pretty much the same and usually doing his effeminate "I'm with YOU!" catchphrase.
He appeared in minor character actor bits in major films of the 1970s including WHAT'S UP DOC? with Barbra Streisand and (below) BEYOND THE VALLEY OF THE DOLLS.
Someone got the bright idea to give him his chance in a full-length feature during the 1970s as well...a porn one in fact! In THE SEXPERT, most of the "action" is softcore but for an insert section. Stan mainly does his darndest at a silent comedy bit around the otherwise softcore sex scenes. 1950s TV actor and voiceover performer Marvin Miller also appears along with future soap star Jamie Lynn Bauer!
Needless to say, neither fish nor fowl, the picture was doomed to obscurity, as was Stan's career. To add insult to injury, many of his appearances are confused online with those of later writer/actor Stanley Ralph Ross (no relation).