I don't know where the parent's source is but the kinsey institute has super interesting stats on similar questions. http://www.kinseyinstitute.org/resources/F

I don't know where the parent's source is but the kinsey institute has super interesting stats on similar questions. http://www.kinseyinstitute.org/resources/FAQ.html#frequency http://www.kinseyinstitute.org/resources/FAQ.html#frequency