Several studies actually show that subliminal messaging does not have a persuasive effect. It only has an effect when people are already motivated toward the proposed action. For the image above for instance, if there was a strong need to masterbate present while viewing the ad, there may be an immediately increased likelyhood to call the number. However, this effect is still not fully permiating; no matter the advertising/horiness if you don't need new flooring, you won't call this number.
People see what they want to see and buy what they want to buy.
My family coat of arms has three pears on it. Pears are symbols of individuality, however the number three is very archetypical. Thus, the oxymoron that I descend from: the archetypical individual. Ironic, and oh so disgustingly post-modern.