what's up with that?

Why is it always freakishly windy only when I wear a skirt or dress, and the swirlier the skirt, the stronger the wind.  But the second I change into a straighter fitting skirt or pants, the wind dies down completely.  A pregnant lady who's dress is trying to pull a Marilyn Monroe is so not attractive.  Especially if you are also carrying groceries and/or your hair is in your face trying to blind you.