Men and women will go to great lengths to give themselves sexual satisfaction. Sometimes the
results are not
what was hoped for. One book mentions the case of a man who tried to masturbate by putting
his penis into the
sucking end of a vacuum-cleaner. The result was that all the skin was sucked off the penis.
This method of
masturbation "is not therefore recommended." P. Mantegazza has instanced the case of a penis
caught in a
bayonet tube and in the bath tub faucet. Many similar such cases are known to doctors and
diligent researchers.