would you buy your own birthday cake?

United States
April 11, 2009 10:48pm CST
A co - worker of mine is his birthday today, we didn't know, and we have no idea that is his birthday. Until he brought two cakes in. We ask him what is the occasion? He told us that is his birthday. We were surprised, and we get some candles and celebrate his birthday. Would you buy your own birthday cake, so people would celebrate with you? Is that your culture?