Was watching a documentary about cave paintings. There tended to be depictions of animals. Are there any known cases of clear and obvious depictions of human penises dating back from before writing? If not, what is the earliest verified date of penis graffiti?
Hi, questions on deep prehistory are worth x-posting to our sister sub, /r/AskAnthropology. While there are some anthropologists here, there are more there with a greater focus on earlier time periods
The rock art in France's Lascaux cave includes the famous bird man also known as the falling man. This may not be the oldest to fit your description, but it is very early.