On of th min reasons fr rblm riing within th mrrig rltinhi is th lmnt f incompatibility. On the initil excitement of th new rltinhi wears ut, the ul soon find thmlv locked in a situation where th hr nothing in common. This n be mthing itiv if hndld wll, but it uull nd u bringing a lt f ngtivit int the utin nd this vntull ld to th breakup f the mrrig.