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It's not about the coins you save but how easy it is to save.
My friend saw a penny, picked up a penny, and with her eyes closed brought it close to her lips and made a kissing motion. Just as seamlessly, she tucked it the penny into her jeans pocket and continued the conversation. Slightly embarrassed for her, I chose not to say anything. I didn't want to call attention to the fact that she just picked something up from the ground.