It's not that they should not touch it, it's then if they should avoid touching any of his belongings, in which when Odysseus falls asleep. Eurylochus & the crew were starving in which they Slayed Helios' Cattle and Ate them. So, Helios, in a rage, went to Zeus and asked him to punish the men for stealing from him and eating the "Cattle of the Sun" in which Zeus sends down a lightning bolt destroying Odysseus' ship as well as killing everyone including Eurylochus except for him, Odysseus.
Odysseus wished to avoid the island of Helios altogether. Unfortunately his men were tired and hungry and didn't want to keep going on. So Odysseus finally consented to let them land on the island as long as they made and oath not touch the cattle that was on the island. They stayed on the island for many months and one day while Odysseus was off praying the men decided to disobey and slaughter some of the steer. Because of this they are killed and Odysseus barely escapes with his life.
Penelope, wife of Odysseus. She had a lot of suitors, who said Odysseus was dead and that she should marry one of them.
Circe warned Odysseus to avoid the island of Thrinacia where the cattle of the sun god Helios grazed, as harming the cattle would bring destruction to his crew. Teiresias warned Odysseus not to harm the cattle and advised him to make amends to Poseidon after returning home to Ithaca.
Two instances: 1. When Odysseus is on the island of Calypso, Hermes comes as a messenger to persuade Calypso let Odysseus go. 2. Hermes gives Odysseus advice on how to avoid danger from Circe and how to get his men back from her. He gives Odysseus a magical plant to protect Circe from her charms, tells Odysseus to pretend to want to kill Circe after she tries to cast her spell, and warns Odysseus not to sleep with Circe before she has promised to do no harm to him.
Someone finding his treasure.
Odysseus should not have upset Poseidon because gods were typically appeased to avoid their wrath. By blinding Poseidon's son, the Cyclops Polyphemus, Odysseus provoked Poseidon's anger, leading to his long and perilous journey home in "The Odyssey." Poseidon's vengeance caused numerous challenges and delays for Odysseus, making his journey much more difficult.
By pretending he was insane.
The sailors ears were plugged so that they could not hear and Odysseus was lashed to the mast.
Not to eat the lotus plants
Teiresias tells Odysseus to avoid the herds of Helios cattle on Thrinakia. Teiresisas saw that if Odysseus and men ate the cattle it would bring about their destruction.
Hermes gave him a drug called " Moly"
They are part of the difficulty of the underground ruins. You should be able to get by them eventually.