Tattoos are nothing compared to childbirth imo, and I once got tattooed on my back for almost 7 hours straight, and towards the end, almost passed out from the pain. I have tattoos on almost every part of my body.

Nothing even comes close to childbirth, I think, and I've had a lower body lift as well (removed 3.5kgs of excess skin from my front and back). Even that doesn't come close, and that's supposed to be one of the more painful of plastic surgeries around.