Beds are useful in the regular dimension. They create a checkpoint in case you perish during your adventure. It’s a staple of every house and everyone will want to have one. Except if you’re in the Nether.
Sleeping in the Nether causes you to explode. Probably not a good idea if you’re looking to get stuff done in the Nether. Just remember this one little detail before you set out to fight Blazes and Zombie Pigmen.