They are actually on my legs, and really tiny. I had them all my life, and the doc said they are harmless and they are because of my skin type/complexion. 
But yes, my boy could still be trying to preen me. So nice of him... 
 I will try the piece of paper, thanks.
I usually just give him my arm so he can be distracted and jump on it.
He does love dots, also on clothing!