and that those that sleep for more than 9 hours have shorter lives!
Don't know about that but…
I usually go to bed just before midnight and get up about 0630-0700, sometimes a bit later but I rarely if ever lie in. I sometimes doze for 15 mins in the day too. I reckon 7 a 'night' on average.
My wife is rarely up past half ten and will happily stay in bed until forced out by the kids. She's still in now for example, with it being holiday time / no rush to get the kids to school. That's an average of 8.5-9 per night.
Over let's say 40 years of married life, if she's averaging 1.5 hours per night = 10 hours per week = 500 hours per year = 20000 hours. Now bring that back to a 16 hour 'awake day', that is an extra 1250 days or about 4 years that I'll be awake compared to her.
If only I could get those hours in usable packets, and didn't have to spend it tidying up because she's such a lazy bint 😉