SDMS-983 - Are Small Breasts More Sensitive? The SOD Lab's Naughty Experiment

A comparative experiment on the sensitivity of large vs. small breasts. Cast: <Large Breasts> A slightly uptight girl, Nana Kunimi / <Small Breasts> Ikumi Nagasaka, Yukari Yamashita, Reika Kudo. The experiment uses brushes, breast kneading, nipple licking, vibrators, and massagers on each subject, evaluating them based on three criteria: <nipple erection measurement>, <brain wave measurement for arousal>, and <vaginal wetness> to compare sensitivity. Given the small sample size, it's not statistically significant, but... Setting that aside, it seems the sensitivity of the mammary glands near the armpits is higher in the small-breasted girls. The actual sex scenes are limited to the beautiful Reika Kudo and the amateur segment. The appeal of this project is the girls' intense, twitchy reactions and the fact that, as an 'experiment,' you get to witness their raw shame as they are directly stimulated without any unnecessary foreplay. I hope they turn this into a series by gathering more cute, sensitive girls for this new genre.