The 29-year-old was uninhibited in her use of the vibrator during a train trip between Bad Kissingen and Würzburg on Thursday, the police said.
But fellow passengers in the open-plan carriage who weren't quite as easy going as she was found themselves stimulated in a different way. They complained to the train conductor, who then informed the federal police.
When the woman reached Würzburg, she was met by police officers and taken to a nearby station.
Police said the “flippant woman” admitted to having used the vibrator in the train, but showed no understanding as to why others might see public masturbation as inappropriate. She did not find the fact that a child had been sitting nearby especially problematic.
However, she will likely have to pay for her free-and-easy attitude. Police charged her with indecent behaviour, which is punishable by a fine or up to a year in jail.