As crazy as the Joker might be, one normal thing he does is attire himself in clothing when he's going about his homicidal business. Over the years, his clothing, though garishly colored, is usually quite...conventional: men's suits with jacket, shirt, vest, and trousers. Joker is unlikely to acquire these suits off the rack at a department store, especially as his preferred colors are uncommon and not mass-manufactured, and his outfits tend to be perfectly fitted to him. Who is the Joker's haberdasher?
Buried Alien (The Fastest Post Alive!)