There are lots of flavors to the lifestyle. We participate in foursomes, gentle orgies, MFMs and from time to time she will solo.
Each of them seems different to me emotionally. Speaking explicitly of hotwife activities, I'm extremely turned on when I'm there, watching her with another man. When she goes to another man's house, I'm thinking about her but not quite so aroused. But when she texts me with the message, 'wer'e done, I'm coming home,' my mind takes that as a signal that she's been screwed and I get tremendously hard waiting for her to get home.
Not disagreeing, just giving another perspective.