Jen: Thanks, Mom. But, I'm 28.
Mom: I know...but today is your birthday, so now you're twenty-nine.
Jen: No, Mom. The year is 2009 and I was born in '81.
Mom: Right...so you're 29.
Jen: Mom. Nine minus one is eight. I'm 28.
Mom (really disappointed): Oh. Sorry. I really thought you were 29.
Jen: I know.
Happy birthday to Amy and me! Amy, hopefully, your birthday call from Mom won't include this detailed explanation of how old you are.