Here's a recent police press release from Erfurt (g, my translation):
Yesterday, shortly before midnight, a 21-year-old female traveler spoke to a member of the federal police in the Erfurt central station. She seemed frightened, and told the officer that she had been harassed by a man in the train from Kassel. After he had stared at her for long time, she moved to a different seat. The man followed her, sat on the seat opposite, and began manipulating his penis. He did not open his pants.
After she got out in Erfurt to change trains, the man followed her. For this reason, she approached the police officer, who located the suspect in the train station. The suspect is a 31-year-old Iranian national. Because he could not prove his identity, the officer detained him. It is also suspected that the Iranian is in the country illegally.
And here's a picture of another alleged train masturbator from Cologne, whom the police are actively seeking:
This guy is suspected of staring at, and masturbating in front of (g), a group of children from 6 to 8 years old in a Cologne streetcar. The children were engaged in Sternsingen ('star-singing') the German version of Christmas caroling. This involves dressing up as the Three Wise Men, singing traditional tunes, and collecting for charity. This guy apparently found this activity sexually stimulating, so he began touching himself in full view of the children, their minders, everyone else on the train, and the apparently the surveillance camera (actually, this probably isn't a picture of him in the act of jerking off in front of small children. But then again, given the facial expression, I'm not so sure).
No word on whether he unzipped his pants. I assume I speak for everyone when I say I hope he didn't.
And these are not isolated incidents. Well, in one sense they are. We have to keep a sense of proportion here, your chance of being the object of some horny foreign man's intense staring and jerking off on your next train voyage is probably very small. But there have been literally thousands of these incidents by now in Germany. Almost without exception, they involve foreign males.*
When it comes to train masturbators, I am genuinely puzzled. I have taken trains in lots of developing countries, and have never seen this behavior there. Nor have I ever seen German males doing this in Germany. I've seen them get drunk and be rowdy, but never masturbate in public.
Another puzzling thing is that these foreign train masturbators often don't seem to worry about getting caught. Most of the time, the woman who was the focus complains to police, and they often find the guy sitting in the train seat, as if nothing had happened. Many of these train masturbators seem unaware that anything they were doing was wrong, or that the woman they were jacking off in front of would complain about that. I am sure another factor is that Germans are a confrontation-avoiding lot who would rather complain to cops than confront train masturbators. I doubt a train masturbator who jacked off in front of a girl in Egypt would reach his destination uninjured.
I surmise there's often alcohol involved here. Most of our new fellow citizens come from countries in which alcohol is hard to come by. And then they land in Germany, where you can buy a bottle of rotgut which will get you pie-eyed for 5 Euros. I sometimes see them tottering along the streets of my own neighborhood, clutching half-empty bottles of cheap 80-proof booze, talking to themselves. But then again, I see Germans doing that, too.
Yet many of these incident reports don't mention alcohol (which police reports usually do when it's in play). Which implies that these men, while completely sober, decided to take their erect penises out of their pants in public and jack off while staring at females. Sometimes while staring at children.
This is why I am convinced that there are an unusually high number of young males with mental problems among the recent migrants. Public masturbation is the quintessential sign of what psychologists call disinhibition and hypersexuality. I worked for almost 4 years in a public mental hospital, and one of the things we had to teach our acutely schizophrenic clients was the necessity of not masturbating in public (they were obviously allowed to masturbate, but in private only).
We don't have reliable stats yet, but I will be happy to bet any amount of money that if we ever get them, we will find very high rates of mental illness among these young lads.