The Riddle of Old Dave, New Dave

I have finally figured out the logical fallacy of aging. Yup, finally cracked it. Boom! We have been thinking about this backwards all along. 

You see this photo? Which one is Old Dave? 

You see that dashing fellow in the yellow shirt? That's not Old Dave. No, it's that 19-year-old kid with the scruffy hair—that's Old Dave!

This guy, right here and now? I'm not old at all, I'm new. From now on, you can just call me New Dave.