Most heterosexuals go about their daily lives as if they are alone in the universe. If asked, they will say "Sure, some men are gay, which means they're into men, not women," but in the next moment, they'll announce "There's not a man alive who wouldn't want a date with Angelina Jolie or whoever.
The IMDB biography of Dennis Cole assures us that "Females couldn't get enough of him," while males idolized his athleticism. That's right, every woman and no man swooned over him.
What about his early modeling in beefcake magazines, notably the gay-oriented Physique Pictorial and Bob Mizner's Athletic Model Guild?
Or his work as the hustler Cowboy in a San Diego production of the gay-themed Boys in the Band?
Or King Marchand, the man who falls in love with a woman he thinks is a drag queen, in the national touring company of Victor/Victoria?.
He didn't play any gay characters on tv, but really, between 1965 and 1995, there weren't many gay characters to play, especially if you were too muscular to pull off a thin, willowy queen. But he played around gay and LGBT characters:
"Star Struck," an episode of Three's Company (1983), with Jack Tripper pretending to be gay.
Rod Taylor in Bearcats! (1971).
Dennis was married three times, for a few years each (his second wife was Jacyln Smith of Charlie's Angels.) When his son Joey was killed in a robbery attempt in 1991, he refused to be associated with any violence in movie or tv productions, which limited his options. He acted on screen only a few more times before his death in 2009, though he continued to work in theater.