I think you're safe with your cars, although the Audi is questionably a GIRL'S CAR!!!! Did any of the guys you met at the parade wink at you?
All kidding aside, we are all aware of those cars ladies particulaly like. A few come to mind: VW Cab, Miata, Z3 etc... Lets be honest, the SLK undoubtedly fits into this catagory.
GO BUY A 500SL !!!