Analysis of information sources in references of the Wikipedia article "Nipple" in English language version.
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There are some females who appear to find no erotic satisfaction in having their breasts manipulated; perhaps half of them derive some distinct satisfaction, but not more than a very small percentage ever respond intensely enough to reach orgasm as a result of such stimulation (Chapter 5). [...] Records of females reaching orgasm from breast stimulation alone are rare.
A few women can even experience orgasm from breast stimulation alone.
Nudity cannot be considered an inherent form of expression.