Second Floor Tenants

My wife and I are living in an apartment on a second floor of a building.  We are both getting cleaned up to go out for the evening when there is a knock on the door.  Two couples I went to high school with tell us that they now tenants on the third floor of the building.  I’m confused that they have not aged a bit.

Amplification:

In our married life we have lived in third floor apartments on two separate occasions.  Residing on the second floor puts us in the middle position.  Having lived in cities, we never wanted to live on the ground floor, the perception being that we were more vulnerable to crime.  I’m not sure if statistics prove that true, but it was a perception that shaped our choices.   The doubling of the younger couples emphasizes that phase as belonging to a ‘younger’ period, and now we have inhabited the middle ground.  There is the passing thought that having these younger neighbors overhead will be a noisy affair.   The location of the dream notable after visiting friends a few days ago who live in a similar three story home.  It’s as if the dream is saying, you are not the same couple you were when you lived in a similar situation.