Frankie Sandmel met Elaina Marshalek in January 2017 while the two were at a retreat for Jewish activists in Berkeley, Calif. After pairing up for a get-to-know-you exercise, Ms. Marshalek, 31, said “there was definitely a spark” between her and Mx. Sandmel, who uses a gender neutral courtesy title. But before they could explore it, Mx. Sandmel, 31, returned to Chicago and Ms. Marshalek to her home in Berkeley. Six months later, they reconnected at a Queer Talmud Camp hosted by Svara, an organization that focuses on studying Jewish texts through a queer lens. While there, the spark between them...