"Buried Treasure" joke

There was this guy who really took care of his body, he lifted weights and jogged six miles everyday. One morning he was admiring himself in the mirror and noticed he was suntanned all over with the exception of his penis which he readily decided to do something about.
He went to the beach, completely undressed and buried himself in the sand, except for his penis which he left sticking out.
Two little old ladies were strolling along the beach, one was using a cane.
Upon seeing the thing sticking out of the sand, she began to move it around with the cane. She said to her companion "There really is no justice in the world!"
Her companion replied "What do you mean?" The little old lady said "Look at that:
When I was 20, I was curious about it.
When I was 30, I enjoyed it.
When I was 40, I asked for it.
When I was 50, I paid for it.
When I was 60, I prayed for it.
When I was 70, I forgot about it.
And now that I'm 80, the damn things are growing wild and I'm too old to squat.