A strag is a Nonhitchhiker.
For some reason, if a strag discovers that a hitchhiker has his towel with him, he will automatically assume that he is also in possesion of a toothbrush, wet-weather gear, space suit etc., etc. Furthermore, the strag will then happily lend the hitchhiker any of these or a dozen other items that the hitchhiker might accidentally have "lost."
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