Personally, I always thought that candy hearts tasted like Pepto Bismal. It was unfortunate that at times they were the only things Sophia stored in the cabinets besides vodka.
[OOC: Niko's secrets are
here (along with Kurama, Henry Fitzroy, D and Jayne). Sugar is anathema to him, so if he stumbled onto any secrets at all, it wasn't many.]