Field Research Report-
After conducting a deep analysis of field studies it is inconclusive who has the best rock hard nipples of all three test subjects observed. That would be Nikki Sims, Tessa Fowler and Autumn Falls.
The observed footage of Nikki Sims (34E/DD Cup) was taken from the enhanced Making Hitachi BTS which has close up shots of Nikki's bare breasts as they are chained with nipple clamps. Said nipples were hard and well mounted in the center of the tits. Tessa's nipples (30J), like Nikki's, are erect and almost hard enough to cut diamonds. With the bigger areolas it looks like Tessa has a slight advantage. This could be an illusion though as Tessa's larger sized boobs were well tweaked in the observed video.
As for Autumn Falls? Weighing in at an impressive 32G (also with large areolas) and being a professional porn star was a good comparison. In theory Autumn should easily get erect nipples quickly as her job requirements demand. The observed footage was from 'Natural Breast Worship' in which Autumn's tits get an oil treatment, milk bath and she herself writhes in orgasmic bliss as a hard cock fucks her. At the end of all that her nipples never got to be the rock hard glass cutters that Tessa's were or Nikki's became after a little coercing from Joey!
TL; DR- I watched a bunch of porn to see who had the hardest nipples and will watch some more to come to a firm conclusion...LOL
#wastingtimeonasaturdaynight