Mary Roach: 10 Things You Didn't Know About Orgasm
"Bonk" author Mary Roach delves into obscure scientific research, some of it centuries old, to make 10 surprising claims about sexual climax, ranging from the bizarre to the hilarious.
(This talk is aimed at adults. Viewer discretion advised.)
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Ron Gutman: The Hidden Power of Smiling
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Bryan Stevenson: We Need to Talk About an Injustice
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Optical Illusion: Perspective is Everything
Definition of "illusion": something that deceives by producing a false or misleading impression of reality.