Am I the only one here to whom this does not apply? :'(
I'm 21 and people are constantly surprised to hear I'm a day under 28. Perhaps it's the full beard or something, but I actually enjoy it - I spent the first 15 years of my life dying to be taken as seriously as I felt/thought and my age was always an obstacle in intellectual discussions or business matters.... so I for one am glad to be considered 7 to 10 years older!