You have already noted that:

So why do you then again, and again, continue to try to connect pin 2 to ground? The text does not say "A" or "Anode". And it does not say "K" or "C" or "Cathode". It does say + and -, and the next sentence in the datasheet says "Correct coil polarity must be observed."

Pin 2 should have the positive potential!
Pin 3 should have the negative potential!

If there is a normal diode between pin 2 and 3, that diode will be destroyed if you connect +5V to pin 3 and ground to pin 2, since the diode will short-circuit your supplied voltage.

Pin 1 and 4 represents the relay contact for 9091. The picture for 9092 shows that it has two contact elements.

The datasheet also says that:
The coil must operate at 3.75V coil voltage.
Normal coil voltage is 5V.
Maximum allowed coil voltage is 6.5V.
The coil may not release until the voltage has dropped to 0.4V.

And yes, you can continue to blow relays if you are going to continue to connect pin 2 to ground and pin 3 to +5V. The only time when it is ok to connect pin 2 to ground is if you have -5V (note the negative sign) to supply to pin 3. That is why I already told you once that you should stop experimenting and get the required theory. You wouldn't build a house or a car engine by just connecting some random equipment and see what happens?