You know, Disney turned into a hardcore slash studio so gradually, I didn't even notice.
Lando Calrissian is pansexual now, haven't you heard?
GEORGE LUCAS (1980): If I had to describe Lando, I'd say he's this very charismatic smooth-talking con man. He's a flatterer skilled in using the spoken word to disarm people to get what he wants. Absolutely irresistable to the ladies.
His weakness is that sometimes he takes it too far, and provokes suspicion.
WHITE SLAVER DISNEY CORP (2018): Sure, Pando Calrissian likes the ladies, but he also likes to charm Han Solo into giving him blowjobs in the cantina toilets. LOL!
UPDATE (May 29, 2018): Forgot I had a copy of Star Wars: The Annotated Screenplays at home. Lando's original character description among the script writers (p. 196):
"Lando was discussed as 'a new Han Solo character.' He is described as a slick, riverboat gambler dude. Unlike Han Solo, this guy should be elegant, sort of like James Bond. There were discussions about getting this new character a sidekick, a girl or female alien or a matched set of girls...possibly something odd and outrageous. This man should be charming so it will not occur to the audience that he would betray Han and Leia. "
Nothing there about him sticking his dick into the Millenium Falcon's hyperdrive motivator.
UPDATE #2: There was also some discussion that Lando could be a very rich businessman, with connections to the highest echelons of the Imperial elite. So that he'd be someone that even Darth Vader would be reluctant to tangle with.
UPDATE #3: Also some discussion that Lando could have been one of the last remaining clones from the Clone Wars.