I've tested out with some male traits too (and yes, boy howdy, do I have hairs on my chinny chin chin).
I've found that the best place to see those long chin hairs is in the rear view mirror in the car. So one day I was tweezing a particularly loooooog one in the car on the way to work, and listening to the radio when a guy called into the radio station and said:
"Man, you're not gonna believe what I saw. A woman plucking her chin hairs on the way to work."
I swear.