These jokes of Q&A type are allegedly from the Question & Answer series of the Armenian Radio. A typical format of a joke was:
The Armenian Radio was asked: "<...>"
The Armenian Radio answers: "<...>".
Once established, this "headline" became a standard format of many Q&A jokes, and it is often difficult to recognize what was the original format of the joke. A further problem, or asset, with these jokes is that as many were passed from ear to mouth, they changed accordingly over time. Often the first step was affirming with "In principle yes" and then adding an explanation after the famous "but".
Examples of different structured Radio Yerevan jokes:
no but (living standards)
The Armenian Radio was asked: "Is it possible to enjoy life to the fullest in the Soviet Union?"
The Armenian Radio answers: "Yes, if you like crowded trains."
with the famous but (sex)
The Armenian Radio was asked: "Is it good to sleep with an open window?"
The Armenian Radio answers: "Yes, but with a woman it is better."
typical formulation (censorship)
The Armenian Radio was asked: "Is it true that in Moscow, Mercedes cars are being given to citizens?"