At the turn of the century, a cowboy was riding across the New Mexico desert heading for Phoenix.

At the turn of the century, a cowboy was riding across the New Mexico desert
heading for Phoenix. He rode over a hill and saw an Indian lying on the
ground, naked with a hard on. Being a curious type, the cowboy rode over to
the Indian and asked just what he was doing. The Indian replied, "Me tellum
time." The cowboy was doubtful that the Indian could really tell the time,
so he asked, "What time is it?" The Indian replied that it was 10:05 in the
morning. The cowboy pulled out his pocket watch and sure enough it was
exactly 10:15! The stunned could do nothing but continue his ride west.
That afternoon the cowboy saw another Indian lying on the ground, naked with
a hard on. He rode up and asked "Injun, what are you doing laying there on
the ground?" The second Indian replied, "Me tellum time." The cowboy was
sure that this one was lying, but to humor him he said, "Okay, what time is
it?" The second indian said was about 3:45 in the afternoon. The cowboy
again looked at his pocket watch and sure enough it was exactly 3:45!
The now incredulous cowboy continued his ride west. Near sunset the cowboy
spied yet another Indian laying on his back. But this third indian was
vigorously masturbating. The cowboy rode up to him and said "I know you
ain't telling the time, so just what in tarnation do you think you're
doing?" The third Indian replied, "Me no tellum time - me windum clock!"