'It's caused by drowsiness or acute boredom; a polite person tries to stifle it'
Yawning
X, Y, Z: Its caused by drowsiness or acute boredom; a polite person tries to stifle it
It's caused by drowsiness or acute boredom; a polite person tries to stifle it
It's caused by drowsiness or acute boredom; a polite person tries to stifle it
"X", "Y", "Z"
Yawning
"X", "Y", "Z"