While sex has obviously been going on in the natural world for far longer than we've been around, "we" meaning humanity itself, it's only been in the last hundred years or so that we've been studying it as a scientific subject. The title of this video at YouTube refers to "strange sex practices," but there is no kink discussed here. The images can be described as suggestive, but that's as far as it goes, considering the stock footage used was mainly designed for advertising. And our favorite narrator, Tom Blank, doesn't even say "penis," which leads to an amusing string of euphemisms. What it contains are things we've learned from scientific research about typical human sex practices, from kissing to having a cigarette afterward. Along with the scientific findings, there are the usual Weird History quips, which are funnier for the fine line they negotiate than for the jokes themselves.
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