They never did quit their philandering ways, they just tricked you into thinking they did. A cheating spouse does not just want to have their cake and eat it too; they want the whole bakery. So how do they do it? More than likely, they just recall the times when they were single and juggling multiple partners. Now it's just a matter of making the necessary adjustments. Thankfully for them the cell phone has made coordinating their activities a lot easier.