* debate over the sex of angels
Expression used here and there by some people
Hablar del sexo de los ángeles • To engage in pointless conversation. It is said to come from the time when Constantinople was being conquered, and its people were busy debating over what sex could the angels possibly have
"¡Estaban discutiendo sobre el sexo de los ángeles en vez de trabajando!"
"They were debating over the sex of angels instead of working!"