Age Related Jokes

Best friends wife.

Two midle aged men who were the best of frinds since several years are talking over a beer. Suddenly one of them says in a thoughtful voice: "If I have s**... with your wife, does that men we become related?" The other one looks at him with wide eys and says: "Nooo, but we become even..."

A Geologist from Alabama could tell you the chronological order of Sandstone Layers, but not their exact ages

You could see they're into Relative Dating.
...
*Sigh*
I know you expected that punchline. My apologies, when I'm under pressure my sediment jokes turn a little schist.
Please stay gneiss in the comments.

A 90 year old man gets married...

A 90 year old man gets married to a 20 year old. He goes to the doctor to make sure that he is physically fit enough for relations.
The doctor then says, "You know how young folks can get lonely without someone of their own age to talk to, why don't you get a young border to... keep her company?"
The 90 year old man thinks this is an excellent idea. Later the doctor meets up with him and asks, "How is your wife?"
The old man says, "Great she is pregnant."
The doctor then says, "And how is your young border?"
The old man replies, "Just as great, she is pregnant too!"

Relative's be like

Them: What's your age ?
Me: I'm 20
Them: Oh, when i was your age i was 21

Yo mama so fat

She died of coronary heart disease at a relatively young age and left the family with much of her debt.

A 65 year old blonde has a baby.
All her relatives come to visit and meet the newest member of their family.
When they ask to see the baby, the 65 year old mother says “not yet.”
A little later they ask to see the baby again.
Again the mother says “not yet.”
Finally they say, “When can we see the baby?”
And the mother says, “When the baby cries.”
And they ask, “Why do we have to wait until the baby cries?”
The new mother says, “because I forgot where I put it.”