Is there anything I am supposed to be doing about this? He will crawl up on my or my husband and suckle on our t shirts and paw at us while purring (usually in the crook of our arms or at the neck line. He will lay close to my neck and have at it. He has also taken a particular fondness to one of my blankets. I recognize that he is looking to suckle. What should I do about this? His brother does not do this(suckle) but every now and again he will just paw at my chest.