In the 17th century, there was a practice whereby drunken sailors paid a few pence to sleep on ropes instead of on the ground. That's where the term resaca in English comes from, "hangover".
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In the morning, his superior would cut or untie the rope and the drunken sailors would fall to the ground, wake up and go back to their work.
You can sleep without having to lie down without the risk of serious problems, but the body would not appreciate it the next day.
