Pretty interesting, I got curious about the depth of the subject though...
I guess that "straight marketing", or mainstream, or whatever you want to call it, works differently... A straight guy definitely won't buy an A&F or D&G because of those ads, they buy it because they already know that it is mainstream, regardless of which ads they see from now on.
There are 2 ads from Armani that I really like, with Megan Fox and Cristiano Ronaldo.
Both of them have a (straight) sexual message, and I believe that a large group of straight men, when with 10secs of video they saw Ronaldo in his underwear, stopped paying attention. However, they can describe in detail Fox's bra and jeans.
I really like this subject actually, when I was in College I took a subject in Marketing and we had a debate on "Does Sex sell?" and I kinda convinced people that sex doesn't sell, but creates a buzz. Those 2 Armani videos may be trendy, but next time I go into an Armani shop, if I decide to buy something, it won't be for Ronaldo or Fox.