Food might not need any special tricks because we're pretty wired to interpret images into flavors.
For porn - I was going to say: "...when was the last time porn needed ads? - aren't the ads basically a demo?
Alcohol (AFAIK?) advertises on the "mind-share" effect: when you're going to buy something, which is the thing you've heard of the most?
Reality TV is the interesting one - I wonder, what percent of the advertising screen time is spent on audience reactions?
Alcohol is all about creating a "better version of yourself" (short-term, while under the influence). And in reality tv and porn you watch better looking / more interesting others (porn, reality tv) to lose yourself.
Everyone knows the reward offered by those things.
It's harder to market a product that makes you believe you can obtain otherwise long term term advantages, like a dress that makes you look thinner or home improvement items.