That's not to say that there aren't people who genuinely enjoy a little kick in their food. Entire countries aren't making traditional dishes as dares, after all. But there's a special subset of people who will use any opportunity to demonstrate their tolerance for pain, even something as benign as a meal. Consequently, there's no chance they will eat it quietly, either. They will let everyone else at the table know between each bite, each labored swallow, that "This is nothing" and "I'm from [insert culture], now they know spicy!"
Worst of all, if you happen to live with one of these people, each meal is a harbinger of domestic terrorism. Regardless of anyone's ability to choke down hot food through sheer will, that will has no say on the final product which fires back out of the body a couple hours later. Taste bud sensitivity may vary from person to person, but butts are pretty much all the same, and they don't like habaneros.
So if you're the type of person who eats extremely spicy food just to prove a point, you should know that you're not commanding the hushed respect of everyone around. They are silent because they are listening for the screams of your lower intestine so they know how much time is left before they have to flee.