I don't get it either. For me a relationship is based on love, not which bits gets put into which holes. Love is love no matter if it's on-line or off. Cheating is giving love on the side without your spouses aproval. I've met girls who in theory would like to be one of many slaves, but none who when it gets around to it actually want to follow through with it. But I'm not going to judge or make assumptions. I'll just keep trying to understand, (out of my own selfish interestswho wouldn't want a harem of their own).