Yossarian...braced himself suspiciously. A minute passed. 'Why?' he found himself forced to ask finally.
Orr tittered triumphantly. 'Because they're better than horse chestnuts,' he answered."
Orr was tinkering with something and Yossarian watched him.
"'When I couldn't get crab apples,' Orr continued, 'I used horse chestnuts. Horse chestnuts are about the same size as crab apples and actually have a better shape, although the shape doesn't matter bit.'
'Why did you walk around with crab apples in your cheeks?' Yossarian asked again. 'That's what I asked.'