In the episode, Springfield legalizes same-sex marriage to increase tourism. After becoming a minister , Homer starts to wed people to make money. Meanwhile, Marge 's sister Patty comes out as a lesbian and reveals that she is going to marry a woman named Veronica. Marge originally disapproves of this, making Patty frustrated.
They are identical twins but with different hairstyles and are both voiced by Julie Kavner. Selma is the elder by two minutes, and longs for male companionship while her sister, Patty, is a lesbian. Kavner voices them as characters who "suck the life out of everything". Although the two have a similar look, there are several easy ways to distinguish them.
Like her twin Selma , she has a strong dislike for Homer. Patty is a lesbian. Despite the similarities between her and Selma , Patty has been shown to be more jaded than her sister, particularly towards relationships. Marge once said Patty chose a life of celibacy, but Selma had it thrust upon her. Patty's decision to not have relationships has been implied to be due to her then-closeted sexuality.
During the gay-pride parade on Jaws Wired Shut, one of the floats included two people who weren't coming out of the closets, one being Waylon Smithers an obvious and another was either Patty or Selma. I'm guessing it is Patty since Selma has had so many heterosexual relationships in the past. Anyone agree, disagree? They're both so outwardly weird. You never know what they might be involved in.