No need. JMS even regaled us with the sight of his genitalia.

Yeah, there's not a lot of mystery left when the character has used his genitalia to cheat at cards.

Midnight at the Firing Line, when Garibaldi points out the Centauri tried to con the humans with a "lost colony" tale, Londo says "cut my wrists", Garibaldi shoots back that Centauri don't have arteries there, and Londo says: "Well, of course not. What do you think I am, stupid?" That early, I was his. :)

Awwwww. For me, it took until Born to the Purple, when Adira asked him what his password and he replied 'wine, women and song.' Oh, Londo.