I think they call it common sense. A woman of your tribe who would willingly open herself for use by members of an opposing tribe is a traitor, unworthy of being recognized, accepted, or trusted. If she'll let niggers fuck her, you don't know what kind of DNA or diseases are lingering around inside her, or what fucked up behavioral traits she's picked up. You definitely can't count on her to be loyal to her own race if she's willingly sucking nigger dicks, so any white women who fuck niggers have basically chosen to leave their tribe and join the niggers. Should any Us vs Them scenario arise, white women who have fucked niggers will betray their own race's interests in order to defend niggers, thinking themselves noble. TLDR white women who fuck niggers are human garbage and never again to be accepted by white men