Why is it that females and males, have partners that they are in love with, and then they marry, and all is well and happy. Then one of them goes and has an affair or has a mistress on the side, while still remaining with their partner? I never understood that. If you love your partner, and go out of your way to marry them, then stay with them, why have someone else on the side lines or hidden away? When I am in a relationship or ever get married, I plan to not cheat or have an affair or anything like this type of thing. But why do you think so many people do it? Have any of you or know of anyone that has done such a thing?