You ever take note of what other people are buying while waiting in line at the grocery store? Normally, nothing very interesting, particularly if they're doing major grocery shopping. If there is a time, though, that might cause you to do a double take it's when people purchase just a few items and the items might suggest (at least to someone with a vivid imagination) some sort of unsavory connection. For example, wouldnt you think 'hmmm' if it was Halloween and the guy in front of you was buying nothing more than a bag of apples and a package of razor blades? or a bag of candy and a bottle of rat poison?
What might you infer if the person in line next to you had three items on the conveyor belt: a box of matches, a can of lighter fluid and a box of sympathy cards?
How about at the campus convenience store when you see the young lady in front of you buying a six pack of Coors, a bag of chocolates, and a package of condoms?
I'm seldom one to strike up a conversation with a stranger to begin with and keep my thoughts to myself at the grocery store, but one time I was front of this lady who felt it necessary to point out to me "You know that (junk food I was buying) is the worst thing for you. Processed sugars cause ADD, cancer, heart attacks, scurvey, strokes, STD's, Dengue fever, blah blah blah...." Anyone else ever had something like that happen to them?