Question: Who is tapping me on my leg?

 
I swear, I’m telling the truth.
I don’t know if this is poltergeist or spooky phenomena or what.  But almost always it happens when I’m taking a brief afternoon nap.  It could be a guilt response or something like that.  But I swear it happens. 
I will be dozing and almost into dreamland and someone or something taps me twice on the leg.  But there is no one in the room or no one else in the house and tap tap on the leg.  Once I and positive I felt someone squeeze my foot when in a dreamy recumbent pose.  But, no one in the room.  Then there was a tap tap on my shoulder as I was drifting into snooze land.  All as if to say, I should be doing something productive.  Or get up and go for a walk.  Again, I’m telling the truth.
Does this ever happen to you? 
It is as real as Sheba thumping me on the leg or arm.  “And then saying, “Get up and unload the dish washer, now!”
But anyway, it has happened many times for the past few years.  It’s annoying.  It truly interrupts my very brief naps.  If only I could catch that rascal tapper.  I would put my foot up its Waa zoo.  Maybe I should write ‘Ask Amy’ or ‘Miss Manners.’  Dog gone-it anyway.