Though aroused by the proximity of a female in heat, male camels lack the instinct that should direct them to the appropriate orifice and have to be assisted- manually. Authoritative sources suggest that only this human intervention has saved the species from extinction since the camel was domesticated, though some say they are just bone idle and if someone is willing to lend a tactful hand, you will not hear a camel say no.
-Africa: Biography of a Continent, John Reader
Let it be known there were no she-camels in our dabouka and no wayward orifices amongst us. KhairAllah often said No to us, in English, instead of Laa, in Arabic, but I never heard a camel say that.