Has anyone here ever dated a narcissist?

Yes but it was very short lived (less than 3 months). I have a low tolerance for people that saves me sometimes.

Married a covert one.

I unfortunately did marry one. Divorced thankfully..

Yes.

Six years. What do you want to know?

Very briefly.

Only about 0.5% of the US is considered narcissistic, so probably not many.

Being an a-hole isn't a mental disorder.