Lucky Star Prostitution Ad
In Japan they have something called deriheru, which is short for delivery health. Here in America, you may know this service better as an escort service... aka call girls... aka prostitution. Lonely men see advertisements for these deriheru, call a number, & a woman from the service comes to pay them a visit.
One delivery health service in Osaka decided to pitch directly to the otaku consumer, as you can see in the picture above. That's right, they're using Kagami & Miyuki from Lucky Star in order to sell prostitution. Personally, I think this is a little misleading. If I were to see this ad & call up the service, I'd be expecting Kagami to show up at my door. Now if there was some magical place that could actually make THAT happen somehow, I'd be all over it. =b
Source: http://kotaku.com/5010136/lucky-star-used-for-prostitution-advert