Niki was looking for an assistant with great observational skill.
So he asks each guy that comes in "What's the first thing you notice about me?" and everyone says "You have no ears!". Needless to say none of them gets hired.
Finally one guy says "You're wearing contacts".
Niki Lauda says "That's awesome! You're the first guy to notice! Tell me, what gave it away?"
And the guy goes "If you had ears you'd be wearing glasses"