Setting the Mouth on Fire

I went to the supermarket this afternoon and the guy behind me bought only 2 items. They were:
1. A packet of Wrigleys strong mint chewing gum
2. A packet of Dunhill cigarettes

I kept thinking that this was such an interesting combination. If he needs the gum to kill the smell of the cigarettes after he smokes, which one is actually more essential? But if you really think about it, cigarettes and chewing gum arnt really the most essential of items anyway.