"Unlikely Lunch Date: Bill Gates and Warren Buffett's McDonald's Coupon Adventure"

Bill Gates recalls a humorous incident in which his close friend Warren Buffett, known for his frugality, treated him to lunch at McDonald's and paid using coupons. Despite being billionaires, Buffett's simple lifestyle choices, including eating at fast food restaurants and driving older cars, reflect his commitment to frugality. Gates shares this anecdote to highlight Buffett's value for a good deal and his dedication to philanthropy, as he has pledged to donate over 99% of his fortune to charitable causes.