Quote from Bert in the episode Spoiler: Bert Gets Married
Bert: Well, we do things differently where I come from. Chana: Pasadena? Bert: Yeah. When a man and a woman love each other, they're monogamous. Chana: What is "monogamous"? Bert: They only have sex with one another. Chana: And everyone in Pasadena does this? Bert: Well, I can't speak for everyone, but a lot of them. Definitely more than in Beverly Hills.