If we were still swinging, we wouldn't have a preference. She wanted us to quit when our ******* got too old to take to their grand parents ... they're 14 & 16 now. She's even more level headed than I am. One of our best married couple friends are black. My wife works in the same department with the wife, and we do things together 2-3 times a year + she does "secret santa" and school stuff with her. They know we have been swingers in the past and have been curious about it.
My wife is attracted to the more polished, educated types with good physiques ... penis size isn't a game breaker unless its either too small or too large. She can reach orgasms almost by breathing on her clit.