I think the dynamic changes depending on the black man. Some guys we met just wanted to fuck her on occasion; she was one of a few white women they had. The longest and most intimate relationship we have is with our current Black Dom of 2.5 years. Our comfort level with him is very high, our sexual hunger for him is the strongest we have had. About 6 months after meeting him, with us seeing him weekly, we gave him a key to our home, the ultimate sign of submission for us. We also know he respects our family time and does not abuse his access. We have often discussed live-in, but not sure if 24/7 is really realistic.