to remain silent or hold oneself aloof in a sullen, ill-humored, or offended mood: Promise me that you won't sulk if I want to leave the party early. a state or fit of sulking. sulks, ill-humor shown by sulking: to be in the sulks. Also, sulker. a person who sulks.
Some cite the fact that secretions from the millipede repel other insects as a reason why they are beneficial. While millipedes do not bite, the sight of them can still be unnerving, especially when they appear in large numbers. They have the ability to crawl up walls and enter homes through small openings.
A female millipede lays eggs inside a nest underground where they undergo an incomplete metamorphosis. Once the eggs hatch, the baby millipedes remain in the nest until they molt at least once. The millipedes gain new body segments each time they molt until reaching adulthood in 2 to 5 years.