Going black is very different than seeing her (in my case wife) with other white guys. After swinging for years, and throughout playing all kinds of kinky games including cuckolding, sitting there that first time and watching her in total *******, I truly had a range of emotions. He took full control of her and it seemed like my presence was not a factor. Over the next three nights he turned her into his slut, and everything for her was all about him. Yes I was scared. And for the first time not needed, not desired for intercourse after he left.
I have seen two other women have their first black experience and that was cool, because there wasn't an emotional attachment for me.