TV time

I don't watch TV except around World Series or Super Bowl time, so I'm blissfully ignorant of the details of pharmaceutical DTC advertising. But the last couple of nights I've had the pleasure of watching the Series and checking out some of the ads. Watching with kids, I was braced to explain 4-hour erections like I did last year, but at least during the part of Game 1 I watched with youngsters, that wasn't an issue. The Flomax ad, featuring men happily holding it in despite their BPH, didn't spark any questions even when the "reduced semen" side effect was mentioned.No little ones were about when the Levitra ad came on tonight. Like Viagra, this drug features the 4-hour erection warning. No surprise there. However, I was mystified to see a little white text pop up in the corner during part of the ad. It said that Levitra doesn't prevent AIDS or HIV. No kidding. Why would it? And hasn't Pfizer been criticized because Viagra is widely used as an MSM party drug, potentially increasing HIV transmission?Can someone explain this to me?PS --The Cialis ad toward the end of the game had the same message.