Woman fucks a random black guy one time and becomes pregnant 2 weeks later. Same woman fucks white guy in LTR for 3 years and never becomes pregnant because "I dunno babe it just never happened"

Woman starts dating a black man, pregnant before the year is out, the black guy leaves, she raises child alone, etc. The same woman could start dating a white NPC for the same amount of time, not pregnant, they break up anyway

This is why there are so many single mothers with mixed children because literally every single time they bang a black guy they become pregnant. If they are in a relationship with one for years they breed multiple. While white guys are fucking women for some cases for years and no pregnancy

What's going on?