Using labels for attraction and gender is a way to bring people closer together and share communities and issues. It’s limited to dating, though obviously it helps to find people who fit each other’s attraction. “Oh you’re pan? That’s awesome, I’m gay and this is my boyfriend!” / “I heard Stacy is single, let’s hook her up with Jane, tee hee” / “Does anyone know where I can find a gender-neutral restroom at the airport?”