Cultural and civilisational, epochally different, as we have changed the very nature of our societies and hence ourselves, that is to say how we reproduce our lives, life as such/mode of production, depending on the pillar relationship in a given epoch/civilisation/culture.
For instance, a quote from Wiki:
Human sexuality comprises a broad range of behavior and processes, including the physiological, psychological, social, cultural, political, philosophical, ethical, moral, theological, legal and spiritual or religious aspects of sex and human sexual behavior.
Sexuality varies greatly by culture, region, and historical period...
My comment:
Well, not "greatly" but essentially! Human "courtship" today and 2000 years ago in Rome, for instance, or 1000 years ago in feudal Turkey, have nothing in common, when it comes to "how one chooses a mate" [if one can choose at all, i.e. if it isn't all determined for one by others/customs] etc. Or how frequently one does it or whom with, which positions one assumes etc. etc. Ancient Greeks anyone? Victorian England? "Modern" Japan? Kama Sutra's India and today's India? And so forth...
So, how is this "natural behaviour" "natural" if women [or even men, as potential sexual partners, for that matter] can't choose for themselves for who knows how many thousands of years - and then, we change it drastically? What happened to "natural behaviour" up until then? And how can we be so presumptuous to claim that this behaviour we now established is an absolutely "natural" one, i.e. in accordance with [no less than] the "laws of nature" and hence "normative". From those, then, we start building legal, political, societal structures [customs and even "feelings" according to such "values/attitudes/principles"]... Should we not be really careful there?
Our 'mere observations', as seen above , are marred [frequently utterly uncritically] by our time and space, our experiences, education, our societal structures [Darwin and Wallace by Malthus, for instance] etc. etc.
"Objective" suddenly seems very temporary and heavily time/space dependent. We better answer those Q's before we jump to such far-reaching conclusions, with many potential consequences with regards to how we see ourselves, our very "nature" and then organise our societies in accordance with the "latest scientific 'insights'"...
One more important point: Modernity has different strands, one could say: an aggressive subject, forcing everything before him/herself, as it were, as well as the intersubjective strand, as Habermas would have us believe. Many consequences, many possibilities to be drawn from there...