Advertisers have long known the best and quickest ways to grab the attention of their audience. Those who create ads for television are especially aware of this. They only have a short amount of time in which to attract their target audience, because most of the viewers start to head for the refrigerator the moment a commercial comes on, and the advertiser must compete with snack food, soda and alcoholic refreshments for the attention of viewers.
Humor is successfully used by many advertisers to make an impact on the buying habits of their television-watching audience, but not just any form of humor will do. Advertisers are aware that although lowbrow humor may repel some viewers, it's nonetheless likely to appeal to the great majority. Nothing says "buy this shampoo" quite as effectively as sexual innuendo about size and volume. Sexual innuendo can also be effectively used to hawk junk food.