This reminds me of something that happened when I was just a bit younger... My girlfriend and I were graduating from pharmacy school and she was applying for residency positions (yes, they have those for pharmacists). Well, she found out she got the one she really wanted and so that night we went out to a nice dinner to celebrate. We did it up like you would expect a happy couple to - nice bottle of wine, share an appetizer and dessert, etc. We were still living on loans at the time and so in my head I was keeping track of about how much the meal was going to run me at the end of the night (for better or worse - keep in mind we were in college at the time). We had easily cleared a hundred bucks (quite the meal for college students who usually eat $7 sandwiches or more likely cook for themselves!), and when it was time for the bill, our waitress told us "The couple that was sitting over there paid for it."<p>!<p>You wanna talk about made our day? Try made our week. We had seen the older couple earlier, but we didn't know them, and they were gone by the time we got our bill. We couldn't even thank them, and we were just so... shocked. Since then, whenever we go out for a nice meal, I look for a young couple who looks happy and in love, just waiting to return that favor.<p>C.S. Lewis described altruism in one of his apologist books as a "good infection" - kindness that spreads uncontrollably. I can't do anything but agree.