A contested divorce sounds like one spouse asks for a divorce and the other contests it, perhaps trying to block the divorce from taking place. However, that's not what it means under modern divorce laws. With the shift to no-fault divorce, no one has to prove that the legal split is needed, and it's far easier to get a divorce than it may have been in the past.
If you ask most divorcing spouses, they will have several reasons why they decided to bring their marital union to a close. Some spouses might not be entirely clear about what happened -- they just know that it's time for them to move on. If you take a poll of Pennsylvania divorce and family law attorneys, they'll also be able to give you a long list of the reasons why marriages end.