Question: Cat Walking Very Edge of Bed Perimeter?

A Cat Leaps Softly onto Your Bed While You Are In It And Proceeds to walk on the very edge up the right side back down the right side across the foot of the bed on still on the very edge of the mattress then up the left side back down the left side across the foot of the bed again then back up the right side still on the very edge of the mattress and may repeat the pattern one or two more times. Which leads one to say, "What the F**k are you doing?"