When i read about masturbating and devices i am always remembered about Morbus Kobold.

What it is you may ask?

In short: Holding your Wiener i a Vacuum Cleaner is not a pleasure...

Here is a scientific paper on that matter:

https://www.klopfers-web.de/download/DOKTORARBEIT_Penisverletzungen_bei_Masturbation_mit_Staubsaugern.pdf

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