The first shall be last

My little sister is married now. It seems that once I graduated college I gave up on the firstborn child's natural right to do everything else in life first. I will be the last to finish school, the last to get what is known as a "real job", and very probably the last to get married (let us stipulate that I will still count as "last" even if I never manage the feats in question).

I am not sure what the significance of this is. But I feel old. Or, more accurately, I feel like I need more time. Perhaps we can add a few years to the mid-20s.