i want to get a tattoo on my ribs and. . ?

and im just wondering about the pain compared to other parts of the body and if anyone knew of a good numbing cream. . i have 7 tattoos, all of which i have gone thru without any kind of pain relief but i have heard that the rib cage is extremely painful so im a little scared about it! i have heard grown men who have their whole bodies inked saying that they barely made it thru the ribcage. . so im kind of really freaked out about it. .