I'm a light sleeper and sometimes just get a few hours a night.
But I know people who can go to bed at 10pm, and sleep right through till 1pm the next day (that's 13 hours) without waking up once. Not even to go to the toilet.
Another guy I know, he's about 12 years older than me, and he can sleep all day and night. I told me he was 20 hours in bed asleep without waking up once.
I said, 'Gawd, you must have been bursting for the lav.'

He said, no.
I'd hate to be like that. These people are sleeping their lives away.
How much sleep do you get? Thanks.