In the 2015 Lando comic series, it’s revealed that Lobot and Lando are very close, almost like brothers.
It’s not entirely out of the question that the two could have had a secret affair during the events of Empire Strikes Back. You can purchase the Lando comic series over at Marvel.
Donald Glover, who plays the young Lando, along with screenwriters Lawrence and Jonathan Kasdan have confirmed this aspect of Lando’s personality, which brings up the question of whether or not he and Lobot were lovers in The Empire Strikes Back. Empire Strikes Back didn’t really paint a clear picture of Lobot.
There are many parallels between L3-37 and Lobot, which Lando obviously picks up on when they meet later in life.