I MEANT finger on the bean.
Back in my snowboarding days, I used to live at a well-known US resort with a bunch of crazy riders, on of whom used to boast that various girls would go home and be "flicking the bean" as they thought about him.
As the only girl in the household, I should have been outraged and offended but it cracked me up.
I was getting at the wankiferous nature of many fashionistas.