What are some aphrodisiacs?

Some aphrodisiacs appear to gain their reputation from the principles of sympathetic magic, e.g. oysters, due to their shape. This also explains the trade in the phallic-looking horn of the rhinoceros, which is endangering this animal. (See Carl Hiaasen's 1999 novel Sick Puppy.) Other animal-based aphrodisiacs gain their reputation from the apparent virility or aggressiveness of the animal source - such as tiger penis - also endangering the species. Turtle eggs, eaten raw with salt and lime juice, are also said to be an aphrodisiac, leading to the poaching of many turtles, which are cut up to extract their eggs. However, most poachers dig up freshly laid turtle nests and very rarely cut up turtles to extract eggs.