A husband or long term boyfriend
who either likes to watch his wife with other men or is forced to watch. Often there are different levels of humiliation involved such as chastity, financial, sissification, etc. Terms surrounding cuckold include cuckolded, hotwife, bull, lover, etc.
Different levels of cuckolding can be seen at www.KingdomFetish.com Here the wives show you the many different levels of cuckolding.