"There's a subterranean impetus towards pornography so powerful that half the business world is juiced by the sort of half sex that one finds in advertisements"

In Norman Mailer's quote, "There's a subterranean inspiration towards pornography so effective that half business world is juiced by the sort of half sex that one discovers in advertisements", the author supplies a sharp critique of the pervasive usage of sexual innuendo and images in marketing and its underlying influence on business world. Mailer recommends that there's an underlying, maybe subconscious, drive-- referred to as a "below ground impetus"-- that makes such sexually charged material almost tempting and common in company practices, specifically in advertising.

The term "below ground" suggests that this drive is concealed below the surface area of social standards, discreetly influencing behaviors and decisions without being overtly acknowledged. It highlights the idea that human sexuality is an effective, frequently hidden force that can drive consumer habits and company strategies without manifesting openly. This force, although not always obvious, propels the market forward, sustaining consumerism through the allure of sexuality.

When Mailer describes "half the business world is juiced", he highlights just how substantial this influence is. The business world grows-- it's rejuvenated and energized, as suggested by "juiced"-- by taking advantage of the attraction and guarantee of sexual appeal. It's a financially rewarding strategy, as sexual material can captivate audiences, drawing attention and engagement, which are basic objectives in advertising.

Nevertheless, Mailer uses the expression "half sex" in ads to mention that this is not authentic sexuality or intimacy being depicted, but rather a commodified, watered down variation of it designed to entice and control instead of really inform or link. This "half sex" panders to base instincts, streamlining complex human relationships into consumable, superficial minutes that eventually perpetuate a cycle of desire and purchase.

In summary, Mailer's quote calls attention to the universal and potent force of sexual imagery in commerce, critiquing how it discreetly yet substantially drives and sustains business world, while at the same time streamlining and commodifying human sexuality.