Does my friend have insomia?

Help me solve this mystery. My friend only sleeps about 1 hour per night. I know him well enough to know he is not lying. The weird thing is, he never seems or looks tired. He is perfectly healthy, and has slept very little for his entire life. This appears to be his natural sleeping pattern, but you never hear about anyone who naturally sleeps for less than 4 hours per day.

I read somewhere that lack of sleep is associated with personality disorders, is this true?

I have tried to convince my friend to go to a sleep study, but he is reluctant to explain this to his parents.

I have asked several other parts of the internet and gotten no answers so far.