I get that Desire Demons likely just pick a form they *think* will appeal to their victim, but it's quite funny when 100% of Desire Demons read the character wrong 100% of the time.
Desire Demon: Oh heck! There's a mortal in the next room - I should quickly pick a form to appeal to them.
*becomes creepy naked woman-thing*
Desire Demon: "Behold mortal! I am here to... tempt you."
Me (the player): "... Um... You do realise I'm a straight female?"
Desire Demon: "Oh, well, this is awkward..."
Desire Demon: "Perhaps I can offer you a new set of shoes instead?"
Although in terms of the Tweet, I think it was just a joke. It seems like Demons don't really have a sexuality. They seem more interested in killing things than sleeping with them