I don't know about mankind but apparently gorillas were born to fart :)
Farting gorillas.
Another curious fact I've come across before is that the traditional Inuit pantheon of mythological beings included an important member called Matshishkapeu.
Matshishkapeu translates as the Fart Man. You can read about it in this paper:
RELIGIOUS IDEOLOGY AMONG THE INNU OF EASTERN QUEBEC AND LABRADOR
Matshishkapeu is the Innu Fart Man,
the spirit of the anus who converses
with the Innu with great frequency
especially when they are in the
country hunting, trapping, fishing,
and gathering (Armitage, 1987).
Matshishkapeu is an important
character both in myth and everyday
social intercourse. But he is a
paradoxical character: on the one
hand, he is a humorous being and one
of the most important sources of
laughter to the Innu while they are
living in the country; on the other,
he is a serious character who is
thought of as one of the most powerful
beings in the pantheon of Innu spirits
— able to control the animal masters
as well as human behavior.