Amigo 1: "¿Y qué pasó con la cita de anoche?" Amigo 2: "Bien… pero no quiso bajar al pozo." Amigo 1: "¿En serio? Pues no sabe lo que se pierde."
It seems you're asking for a full explanation of the phrase (literally: "why men like to go down the well"). This is a colloquial expression in some Spanish-speaking cultures, often used with sexual connotations.
Would you like a version of this explanation in Spanish as well?