As you can see from this video Byron is washing Shelley Furiously. this went on for some time.
Now there was a reason for this over zealous licking. Byron was trying to get on Shelley's nerves so much that he would get off the chair and Byron could have it all to himself. The battle for this chair has been going on now for some weeks.
One day Shelley winds the next Byron is top cat again.
By the way the licking didn't win. I think Byron's tongue wore out and he left Shelley to the comforts of the chair.