A man seeks to marry a Sandworm by rhythmically thumping the ground. He comes across the Wormrider Guild, an association of people that breed and ride Sandworms. Here he acquires a device called a thumper in order to marry the sandworm.
The man plants his thumper into the ground and began to crank the thumper to try and get a Sandworm out of the ground. He tried his best and no Sandworms came out of the ground that night.
The next day, the man cranks the thumper again. He cranked and cranked and after a few hours a Sandworm managed to emerge, drawn by the rhythmic thumping. The Sandworm welcomed him with open arms and he bred with the woman inside the shell, securing and consummating the marriage.
The Sandworm continually bred with the man inside the mouth of the shell. With his efforts, he was able to claim the Sandworm and it became his mount. The more he bred with the Sandworm, the more spirit energy he poured into the sandworm. It became stronger and smarter over many months, while at the same time he used the Sandworm to travel across the sandy expanses of the Sand Sea.
He was able to get the Sandworm towards the Wormrider Guild base, where many Sandworms are resting. The Sandworms were bred once every day with their husbands while at the base to keep up their big sexual cravings. One of the Sandworms was much bigger than the others and her name was Shaiana. There was one who had short hair, another with a white shell and another with beautiful blue eyes. The Sandworm that he caught has an unusual habit of pretending to be a damsel in distress.