Here we have a very old erotic painting depicting the God Priapus and the nymph Lotis. It was found on a wall in Pompei (destroyed in AD 79), so is around two thousand years old.
Lotis, the daughter of Neptune, was attending a festival to Liber (the God of wine and viticulture) when she fell asleep (too much wine, no doubt). A nearby donkey brayed, woke her up and she discovered Priapus trying to rape her. Here the artist has depicted her just as she discovers the ever erect Priapus making a grab for her.
There are two versions of her fate: in the first, the donkey's noise enables her to escape but in the other, caught in Priapus clutches, she calls to the Gods for help who turn her into a Lotus tree. This frustrates Priapus but must have been rather dismal for Lotis. She may have preferred a fate worse than death.
More about Priapus soon.