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Drawing upon scientific analysis, historical examination and revealing personal insights, this comprehensive documentary from the Discovery Channel explores the fascinating and often astounding nature of sexual intercourse. Among the topics included are "Science of the Sexes," "Journey of Life -- Human Life," "Architecture & Design of Man and Woman," "Anatomy of Sex" and "From Conception to Birth."

How to Watch Nature of Sex Legally and Safely

If you want to stream Nature of Sex through reputable and legal services, there are a few good options depending on where you are. Subscription platforms like HBO Max, Disney+, Netflix, Amazon Prime Video, and Apple TV+ sometimes carry Nature of Sex films or related DC titles—though availability depends on your country.

If you’d rather not commit to a subscription, there are ad‑supported, free (but legal) platforms such as Tubi, Pluto TV, Peacock or Crackle (where available in your region) that occasionally host superhero films.

Lastly, don’t forget about library‑linked streaming options like Kanopy or Hoopla (if your library or university is registered), and official uploads by film distributors on YouTube—these can also give you legal access to classic movies.