Do you know any jokes older than this one?!

Do you know any jokes older than this one?

A little old lady goes to the doctor and says, "Doctor, I have this problem with gas, but it really doesn't bother me too much because they never smell and are always silent. As a matter of fact, I've farted at least 20 times since I've been here in your office."

The doctor says, "I see, take these pills and come back to see me next week."

The next week the lady goes back to his office. "Doctor," she says, "I don't know what you gave me, but now my farts, although still silent, stink terribly!"

The doctor says, "Good, Now that we've cleared up your sinuses, let's work on your hearing."

Here's a real 'oldie' :
Three economists and three mathematicians were going for a trip by train. Before the journey, the mathematicians bought 3 tickets but economists only bought one. The mathematicians were glad that their stupid colleagues were going to pay a fine.
However, when the conductor was approaching their compartment, all three economists went to the nearest toilet. The conductor, noticing that somebody was in the toilet, knocked on the door. In reply he saw a hand with one ticket. He checked it and left, and the economists had saved 2/3 of the tickets' price.
The next day, the mathematicians decided to use the same strategy : They bought only one ticket, but the economists did not buy any tickets at all!
When the mathematicians saw the conductor, they hid in the toilet, and when they heard knocking they handed in their ticket. They did not get it back.
Why? The economists took it and went into the other toilet !