Among the 6400 items in my iTunes library are four birthday songs: The Beatles' song, first and foremost; “Happy Birthday, Lisa” from “The Simpsons” (and Michael Jackson); that Altered Images' song from the early 1980s, which I associate with a girl I had a crush on; and Loudon Wainwright's song “The Birthday Present,” from his album “The BBC Sessions.” The one I've listened to the most is the Loudon Wainwright song. No contest. I guess I'm the right age for it. I already wrote about it on this blog three years ago but it's worth repeating, particularly since today is the day. I've reached that ripe young age, that halfway point, when life surely begins. Here are some of the lyrics: