While there are insomniac, there are also many people whose only hobby is to sleep and sleep only. They can fell asleep at any place and at any time of the day and maybe without a bed or pillow. Whatever you may call them, they always love to pursue their adorable hobby and do not mind, what you call, to be late. Watching these people, Lingvistov has posted a series of doodles that describe what they feel about their sleeping. You may check the page; but only the sleep lovers can understand the true meaning.
More info: lingvistov.com | Facebook (h/t: boredpanda)