I have extremely temperature-sensitive nipples. A slight breeze blows by and the girls stand up like doggies begging for bacon treats. Which invariably makes Mr. Kitt's eyes light up. Every single time. I could have been shivering on the deck of the Titanic and he would have noticed my nipples getting hard in the cold. Seriously.
My inner comedy stage sports a bewildered Seinfeld: "What is up with that?!"
Look, I know there's some association between hard nipples and arousal and all... and yes, my nipples get hard when they're played with and sucked. But in public? You guys... if I'm out in public, my nipples get hard from temperature change, not arousal. If they're not being directly stimulated by, say, rubbing against my shirt or bra for some reason, there's just no nipple action going on. I don't think my nipples have ever perked up because I was turned on by some guy checking me out. But why is it I get the feeling the guy in the other booth just wouldn't believe that?
To quote Mandy Patinkin from Princess Bride, "I do not think it means what you think it means!"