Mankind first came into existence by the sun, his traces of existence have been found in warm climes. Even Adam who once lived in Paradise was eternally enclosed in warm ambiance, this is by fact that he and Eve could go about naked even in the thick shady forests with no fear for cold breeze.
Considering Africa's climate characterized with warm and hospitable tropics, it's referred to the heritage of the first man. Traces in Tanzania (East Africa) have found remains of the first man "Zinjathropus" and paintings made by early men in Uganda (at a place Nyero painting). These areas are warm and this explains why almost all tribes in Africa were partially naked and had special fashion that covered private parts.
Today someone travelling from the west shall be filled with wonders of the Africa's rich climate, the blaze of tropics, a humid inferno of an everlasting summer. Considering the fact that in the west, the climate is cold and snowing at particular seasons with merely no sun.