Women suffer more pain than men across the whole body, major global study finds
(www.theguardian.com)
Or standardize the pain scale. A 9 on the scale for me is significantly more pain than a 9 for my wife because I have both a high pain tolerance and threshold. I say 9 because I've never experienced what I'd consider a 10 (pain so intense I lose consciousness).
My vasectomy without anesthesia was a 9.5.
But our response to pain is largely learned.