A worker onboard an electric train was rude to all the passenger, ignored any questions, and was generally unhelpful. On this particular occasion the train was in the middle of an intense nighttime snowstorm when the overhead electrical arm broke, disconnecting the train from electricity. The train slowed to a stop an the only light was from emergency lights. The engineer climbed up on the roof of the train to see if he could connect the arm to the overhead wires, but in doing so received a near fatal electrical shock. Fortunately he was able to climb back in the train.  
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The passengers were in real danger of freezing to death since the train was 30 minutes away from the nearest civilization.  No one knew what to do. The bad worker had been eyeing three buxom ladies during the trip and announced that he would climb up on the roof and hold the electrical arm, if every 10 minutes he would get a necessary blowjob from one of the ladies.
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Fearing death they readily agreed and the first lady gave him a great blowjob. So out he climbed on the roof and pushed the arm up to overhead wire and the train began to move. Everyone was surprised he seemed to not be hurt by the high voltage.  
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After 10 minutes he climbed back in the train and rested, while the next buxom babe gave him another blowjob.  After which he again climbed on the roof and got another 10 minutes down the tracks.  This repeated again and he got a thrid blowjob and finally managed to get the train to the next station.
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Everyone was happy to be alive, even the three ladies who gave the blowjobs.  But they all wondered how he survived the high voltage without so much of the slightest injury or discomfort.  He replied, oh, as you know, I'm just a bad conductor.