"Old Lady Wants It" joke

There was this guy who really took care of his body. He lifted weights and jogged six miles a day. One morning as he looked into the mirror to admire his body he noticed that he was suntanned all over, with one exception, his penis, which he really 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 using a cane. Upon seeing the thing sticking out of the sand, she began to move it around with her cane, remarking to the other old lady, "There really is no justice in the world!"
The other little old lady said, "What do you mean by that?"
The first 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 to old to squat