Well, for starters, it’s the food of the gods. No, really. The Mayans honoured the god of cacao.
Then there’s the scientific evidence that chocolate is an aphrodisiac because it boosts your serotonin levels and releases endorphins that lift your mood.
Plus there’s the multi billion pound industry marketing the bejesus out of it as a way to put a smile on your loved one’s face.
Or it could be because you can tantalisingly tease your beloved with it. Try this: pick up a piece of chocolate between your thumb and forefinger, hand feed it to your SO and as their lips kiss your fingers, we dare you not to feel a spark.