Women suffer more pain than men across the whole body, major global study finds
(www.theguardian.com)
https://pmc.ncbi.nlm.nih.gov/articles/PMC3690315/ - postoperative for the same procedures, women rate their pain as higher. I would interpret that to mean they have lower pain tolerance, although as the article acknowledges, its tricky to measure.
Well, sure, I agree, it is probably why women experience more pain, as opposed to they have more painful diseases/injuries.