These sexual investigations were conducted by different researchers (IASHS graduate students) between 1982 to 2000 as a PhD.
In order to test my standard point of view on this issue I decided to try some comparisons among IASHS international students' data along with a broad representative spectrum of a sexual report developed in the USA.
In order to support and illustrate my standard point of view on the internationalization of middle-class sexual history, I checked some NHSLS Report data developed in the USA in order to compare them with the international students' data from IASHS files.
International student respondents were asked on IASHS Survey "How important is sex for you?" For this question there were three possible answers: A--"very important", B--"somewhat important" and C--"slightly important".