So, in a part of the Sculpture Garden I've somehow managed to miss until now (specifically, Jenny Holzer's Selections from The Living Series, number 24 in the list), there are a series of marble benches, each with a different aphorism.
One of them is:
After dark it is a relief to see
a girl walking toward or behind you.
Then you are much less likely to be assaulted.
There are at least two possible interpretations of this.
dru takes the discussion of "attitude" into gender.
More info on Jenny Holzer, and other installations, available at Artcyclopedia.