I am american, caucasion, tall, curvy, brunette (occasionally bottle-red), short-haired, used to have a smallish rack, now have a large one (not artificial). FBF, when we were mono, got himself attracted to a very tiny asian woman, and the only woman he ever brought round to meet us after that was a lovely, extremely thin, african-american woman. Have no idea what his women looked like before I knew him. European though. CBF doesn't seem to have a type, but loses the ability to speak when confronted with large racks.
He will turn his head if someone with a nice ass walks by. But doesn't matter what they look like, if they open their mouth and stupid falls out, he's done.