Why does eating chocolate make us so happy?

It's a chemical thing. The "food of the gods" contains theobromine, a stimulating alkaloid similar to caffeine, as well as phenylethylamine, a stimulant that's released in the brain when people fall in love. Chocolate also helps the brain produce feel-good serotonin, which plays a part in sexual arousal.

Just be sure to indulge in the dark variety with at least 70% cocoa solids to get chocolate's many health benefits. If you opt for milk chocolate, it's just that: milk and sugar with trace amounts of cocoa.