I'm talking about Maslow's hierarchy of needs, as published in his landmark paper "A Theory of Human Motivation" that appeared in Psychological Review in 1943.

You would do well to read it, bearing this whole saga in mind.

But if that is too much for you, Wikipedia has a tl;dr:

"Maslow's hierarchy places sex in the physiological needs category, alongside food and breathing." (https://en.wikipedia.org/wiki/Maslow%27s_hierarchy_of_needs#...)