Emotional appeal is one of the key ingredients advertisers use when creating advertisements. Advertisers understand that by pairing their product with images that make us happy and feel good, or something that we find desirable, we will subconsciously relate those feelings to their product, therefore, making us more inclined to buy their product. This is an example of classical conditioning.
The most common way for advertisers to utilize this concept is to pair their product with attractive models, which also commonly gives the suggestion of sex. This gives the consumer the idea that buying this product will make them more desirable to attractive people, which is generally appealing to everyone.
Below are a few examples of this:
Classic advertisement ploy, getting consumers to want your product by promising them that, if they buy, they'll be better for it.
I mean, no one can actually believe that buying Calvin Klein jeans will turn them into a naked, water soaked Eva Mendes - but the ad still works, people still buy the jeans.
Sadly, in order to get bigger riles out of consumers and to rake in larger sales numbers, the advertisers continuously turn to more and more graphic images. All three of the ads you featured here are inappropriate (this isn't a rag on you) - so where will the line be drawn? In the fifties, if you proposed any of these ideas to marketers, the ads wouldn't have made it out of the boardroom. They're to graphic, too much. But currently, there seems to be no limit to the amount of clothes you can take off of a model in order to make a point and make a sale.
I think that ads that show you will be prettier, cooler or smarter if you buy and wear/use their product are really effective towards people who's self esteem is not that high. After taking the time to realize what is going on in an ad like the ones above, we realize that wearing Calvin Kline Jeans or drinking Skyy Vodka will not make them sexier or help them attract others.
I think that there are many more ads that we view in our life that are not as obvious as the ones above, that trick us into thinking certain things about their products.