Most gay people are no more inclined to deviant or exhibitionist behavior than straight people are. The difference is in our perception when we see it.
Our society considers it perfectly "normal" when Britney Spears or Madonna gyrate around on stage in their underwear. It is perfectly "normal" to use women as sexual objects in advertising to sell cars, beer, tools, whatever. But if we see gay people behaving in a similar manner, we get offended. There is a double standard here.
Do not lesbians find other women attractive? I would think that it should work both ways there. An argument criticizing the use of good looking women in advertisements or whatever can not work because it cannot be assumed that they are just targeted for males.
But I do understand where you're coming from. Just using the image or character of an attractive woman in an ad is one thing, but ads that are targeted to promote one's attractability to the opposite sex is the argument I think you should be making. Something like those TAG body spray commercials, where the guy sprays it and all the girls come running would make your argument much more valid. Assuming you had said that, my response would be this. The commercial is not made showing a guy spraying it and a bunch of guys running to him, because well that is not the norm (people really need to understand this). From an advertisement standpoint, two things are at work here. First off, a vast majority of the population is not homosexual and therefor they have to pick their target audience. And second, and more importantly, because a vast majority is not homosexual, the company does not want the vast majority to see an ad and think, "If I spray this on myself, I'm going to have guys chasing me down" whether they take it that literally or not, it's a subliminal thing.
Anyway, I've gone on long enough again. But just listen to this: We see gay people on TV now on a regular basis. Just try finding a sitcom that makes no mention or does not have a major gay character. Hell, try to find a straight person on HGTV. They're all over TV, and while I find it a bit annoying (obviously, the stations are trying to appeal to everyone, and keep everyone from making noise) I am not offended, nor do I believe anyone else is offended by them being there. The offense comes in everyday life when they try to push that they are the same as everyone else and want the same things, worded the same way as everyone else. Like I've said before, if you want to be gay, by all means, go for it. But, don't force me to be part of your life. I don't force you in mine.