Scarlett Johansson: The Sex symbol of the Post AIDS era

Sleep with her, trouble ensues. Restrain yourself, Happy Ending.

If you want to have someone take a risk which is stupid and/or morally dangerous, everyone will understand why the hero did it if she is the bait. Most of her movies capitalize on the fact that she seems too luscious to resist, but too good to be true. (Note: I haven’t actually seen all of these movies, but the plot points are obvious from the Wikipedia summaries.)