How do you sleep?

[Memphis]

I sleep really poorly , hence why I look like an old bastard.

I sleep really well, still look like an old bastard.

If Julian Jackson ever hit Amir Khan, thats how fast I fall asleep.

Apparently sleep is all mental. You 'could' physically recover from your days endeavours by lying still, no need to actually go to sleep at all. When you sleep, you filter all of your thoughts for the day, delete some and save some to memory. Again I'm not sure about that. If that were the case I'd need about 90 seconds of sleep per day.