Captain Jack Harkness (doctor who, multiple seasons starting with season 2-3 or so of the 2008 reboot) is the media embodiment of this hypothesis.
They spell out very clearly that the time he comes from, they don’t have hang ups over gender and sex, they just do whatever’s good. So he’s very very openly bisexual and a bit of a slut with lax boundaries, because why not? Do what’s good. But he’s still masculine and appealing and a great character all around.