Guys, a trip to the supermarket can spice up your sex life as well as your dinner plate.Birds do it. Bees do it. Even, it is said, educated fleas do it. The problem is that, increasingly, we DON'T do it. The pressures of modern life and a now often normal state of exhaustion mean that our sex lives are suffering. There are solutions at hand, however. And some of them can be found in the supermarket.