Rich people in movies fainting at relatively benign things (idea)

This is a common sight in movies. Rich people, especially rich women, who somehow end up in a place where non-rich people are hanging out, and witness something harmless that makes them faint, like a fat shirtless guy with a big smiley face painted on his torso.

Does this actually happen? Are there really people who are so sheltered that they'd actually faint at seeing relatively harmless activities? Or is this a stereotype that has been spread through theater and cinema?