One I knew wanted somebody who was 'already sorted'. She saw secure job, wife, house, car, holidays and baby and thought if she could get him to leave his wife, not only would she know he actually really loved her, there would be half the value of a house, the family car and his salary to get her into homeownership and not having to work by 24. She was looking for somebody to look after her and keep her in the manner her father had done for her mother.
It didn't end well. The first one she pursued was skint because he'd immediately signed everything over to his wife out of guilt/responsibility. He genuinely loved her, but love doesn't pay rent, buy her a new car and more than three flights to New York for her and friends whilst he stayed at work/home.
The next one did well (fairly) out of his divorce and had a great job. And then he enjoyed himself greatly with screwing one of her friends. It did cross my mind that she mourned the loss of the BMW and parents' villa in Portugal and of face with so many knowing he'd been seeing the friend for 8 months more than the loss of the man himself.
Eventually, she found one that wasn't already married, owned his own house outright and, as far as I know, has lived happily ever after.