When europeans first visited Africa (post roman that is) the dominant foreign power was the arabs, and their main interest was acquiring slaves for the middle east, and exotic animals.
Expats usually arrived as independant traders, often setting up trading posts with usually friendly rulers offering manufactured goods previousy unobtainable, and of course weapons not seen before in Africa. Such traders usually only lived for around 10 years before malaria and other diseases killed them off and new white traders arrived.
They were nevertheless prized by the local rulers who in addition to trading ivory, gold and gems etc tried to ensure the traders had a compfortable stay and so provided them with women and girls (usually captured from a neighbouring tribe, so it was no great sacrifice). in addition these traders had the sense not to interfere with the wives of African warriors so the females offered to them were often young, which did no clash with either European or Africans standards at the time.
As the rulers negotiated more and more weapons they also secured white 'trainers' os shall we call them 'mercenaries' to help train their armies who has second pick of captured women, after the tribal rulers of course! Again such men usually did not live long in the African climate and came as single men and were supplied with all the female comforts they might need which encouraged more to keep on coming depite the high death rates for europeans.
The only serious white colonisation was in the 'empty' southern tip of Africa, which steadily encroached north and east.
The race for Africa was a short lived affair in which europe temprarily, for around 50 years took over the rule of most of Africa. the new colonial rulers did not usually relish an African postiny, with some exceptions and were keen to accept local traditions and practice, and again found comfort usually in the arms of local Africans women and girls eager to please these strange new white men, and that continues to this day.
The tribal leaders generally grew wealthy, and after independance the new political leaders grew spectacular wealthy and industrialisation in the west saw a desperate need for the mineral resources Africa had as well as the gems and diamonds.
Canny African rulers set up trade terms that enabled them to become even more wealthy but the 'power' had changed to the African. Companies and governments were eager to do business and willing to turn a blind eye to excesses as long as they got the oil, and copper, and uranium etc
Whites flocked to Africa now to live in luxurious colonial style setting in an exotic country. This time though instead of the African rulers providing these new expats with women, the pattern had turned. The Africans wanted expats with attractive white wives, and nubile, curvaceous healthy teenage daughters so the Africans could now take their pleasure of white females.
Who in turn discovered the joys and delights of the black cock that they had heard so much gossip about before coming to Africa, and if husbands and fathers wanted to keep their job or advance and make money the price was not Africans pandering to their needs, but white men pandering to African needs symbolised and polarised by erect African cocks sinking into the mouths of kneeling wide eyed white females