Note. This is an alpha version of the description of the 4th Law of Sex. It can change due to the result of our discussion in the current thread.
The latest version always can see here: https://theoryofsex.club/news.php?view=22
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Sex is supposed to be beautiful.

Beautiful doesn't mean romantic. The essence is in the forms - how the bodies look in the process of having sex. If it is beautiful, then the Law of Aesthetics is fulfilled.