Compulsive hoarding is the acquisition of and failure to discard such a large number of seemingly useless possessions that it causes significant clutter and impairment to basic living activities such as moving around, cooking, cleaning, showering or sleeping. Compulsive hoarders often have great difficulty making any decisions, but particularly decisions about discarding and organizing possessions. They have difficulty sorting objects into meaningful categories for storage, perhaps because they perceive each possession as unique and irreplaceable. Compulsive hoarders commonly demonstrate excessive sentimental attachment to their possessions. They feel compelled to collect seemingly meaningless objects because of the remote chance that they might need them in the future. Compulsive hoarders usually feel overwhelmed and embarrassed by the excessive clutter.