He likes to sleep with me when it's cold out, so it's fine, but when it's warm he wants to do that kneading thing of his to the underneath side of my upper arm. I look like I have been a pin cushion.
How old is your kitty and what does he look like?
My Brigid is 15 y.o. and a Bengal type tabby... gold and brown stipes and dots. When she sits on my lap she puts her front paws on my chest and wants to knead. I try to have on a sweatshirt at least at that time or wedge in a towel or blanket.