Let's just pretend that someone forgot to put on a dab of anti-seize on the threads of the 02 sensor before they tightened it up.
And let's just say that same somebody got a replacement muffler to replace one that had a slight rattle in the casing around it. So you grab your O2 socket and begin to remove it. And it turns 3 rounds and stops.
We all know this project has took a bad fork in the road at this point. So I went ahead and laid on the ratchet and rounded the sensor off. Here is what you do if you want to ride. And it's only 50 dollars. Go grab a Universal 4 wire O2 sensor. Part number is in the picture. And solder the end on it. Just follow my wire colors. Blue to black gray to white. And connect both blacks to both whites.