BWC & Colonialism

For the most part it was literally this...

The moment the native women saw the white man's meat and had their bellies filled with caucasian cum; cum that was even more delicious and nutritious than what they were used to, the men knew it was over. Not across the board mind you as some tribesman did prefer to die as men rather than live as cucks - male resistance was especially strong in the Philippines; but overall, the initial conquest of many parts of Asia and the America's was relatively bloodless.

Another reason the native women accepted their new masters so quickly was because they found that on average, the Christian Europeans treated them with a lot more respect & dignity than their pagan brethren.

It wasn't always violent though. Like in our reality, it was more about trade in some places; this was especially true with the French in Canada. It just so happened that one of the resources being traded were women.

Also, thanks to caucasian semen, native women were much more resilient to European diseases like smallpox than their male counterparts were.

It should be noted that this didn't quite work in Africa because, A - Africans and Europeans had been interacting with each other for thousands of years by that point. And B - cause blacks and whites are pretty equal when it comes to dick size; meaning that Europeans had to resort to more traditional methods of colonization.