Mostlikely.
Marketing where the subject realizes that he/she is being manipulated isn't very effective. As such, most people here have been influenced by sex appeal, only it has been done in a way thats subtle enough so they haven't realized it and gotten offended.
Then again, the way the OP was written people only seem to be examining the extremes and not the much more common, subtle touches that are prevalent in almost all entertainment. From my experience, the people who conciously think "Wow, that chick is hot, maybe I should buy that product." are a very small minority. Most of the time people who are affected by sex appeal explain their attraction to the character in another way. (Good writing, relatable, otherwise interesting etc.)
It's ok guys. We're all affected by marketing, and since sex is one of the most abused and profitable aspects of marketing its a fair to assume most of are affected by it. It doesn't make you sexist or a bad person, humans are sexual creatures after all.