The Simpsons has historically been open to portrayals of LGBT characters and settings, and it has routinely challenged heteronormativity.[1][2] It was one of several animated television shows in the United States that began introducing characters that were LGBT, both openly and implied, in the 1990s.[1] While early episodes involving LGBT characters primarily included them through the use of stereotypes, The Simpsons developed several prominent LGBT characters over its run.[3] Producers of the show, such as Matt Groening and Al Jean, have expressed their opinion that LGBT representation in media is important, and that they seek to actively include it.[2][4] Some characters, such as Julio, were created with their sexual orientation in mind, with it being central to their character.[5] The show expanded its roster of openly LGBT characters through episodes in which prominent characters Patty Bouvier and Waylon Smithers came out in seasons 16 and 27, respectively.[6][7] Additionally, producer Al Jean has stated that Lisa Simpson is possibly polyamorous.[8]