TV is a tricky thing. Sometimes TV promises a steamy scene involving sex of course, to get the viewer to tune in the next day. For example, General Hospital, a popular soap opera, shows the previews for the next day towards the end of the show. One day the preview advertised two popular characters, which would make an unlikely couple getting intimate. The next show however, shows the rest of the preview in a different aspect.
Sex sells plain and simple.
Whether it is a man, woman, teenager, or a child it is on our minds, it is in our heads that there is nothing wrong with showing a little skin. To some people, like the censorship board might disagree with us. In commercials, it is apparent that sex is almost necessary to sell the product. Advertisers understand the power of sex, while other people underestimate it. That is why these commercials are so well put together.