Science fiction is, in part, the attempt to show a different version of reality, often one in the future. In the case of Star Wars, that reality would be long ago in a galaxy far, far away. However, even in its vast exploration of the future, there's one area that science fiction generally avoids: restrooms. Fortunately, Star Wars Rebels dove headfirst into this topic, boldly taking one of its characters where no character had gone before.
For some reason, science fiction movies and TV shows rarely seem to address the issue of where their characters do their business. This isn't just a Star Wars thing, either. How bathrooms work in Star Trek is also a mystery, and in Demolition Man, the movie made a strange attempt at outlining a futuristic method of using the washroom with something called the Three Seashells, which may have straight up replaced toilet paper.
In Star Wars, the occasional reference has been made to "the refresher," which is the franchise's term for a bathroom. While it's been mentioned in the books and comics, even being described a reasonable amount in some novels, the refresher's first appearance didn't come until a hero named Wedge Antilles came along and changed the game forever.
A former Imperial pilot in training, Wedge was pulled out of the academy by Sabine Wren and joined the Rebellion. He became one of their most capable pilots, as well as one of their longest-serving members. Joining in the earliest stages of the war, Wedge continued to fight the Empire all the way up to the defeat of the First Order on Exegol. He knew first hand what the Empire was capable of in any form, and refused to let its plans continue uncontested.
During Rebels, Wedge chaperoned AP-5 and Chopper on a mission to steal information from the Empire. AP-5 was successful, but Chopper was compromised and turned into a spy. Realizing something was wrong when Chopper was suddenly polite and helpful, AP-5 tried to notify Wedge of the situation. The pilot just assumed that this was part of the usual sniping between Chopper and AP-5, and ignored the whole mess.
This was the point that the miracle of all miracles took place. Wedge left Chopper to pilot their shuttle while he used the refresher, and AP-5 followed him in to continue their discussion in private. It appeared as if Wedge was about to use the equivalent of a urinal when AP-5 interrupted him. As innocuous a moment as it seemed, this was the first time in a Star Wars movie or TV series that the refresher appeared in all of its glory.
Thankfully, AP-5 stopped Wedge before he did his business on a show aimed towards a younger audience. Nevertheless, it was still an oddly important moment for Star Wars and science fiction as a whole. It's rarely admitted that characters occasionally need to use the bathroom, let alone what the facilities look like. For Wedge's sake, let's hope the Star Wars franchise didn't also adopt the Three Seashell method.