the main problem with single moms ,it's than it's shaping your brain into something an eventual futur "dad" and to a futur "cucked beta" , and more, sexually it's not really healthy because it will be allways ,you ,the girl and the kid,it's allready a trio even before your start eventually to date the girl,some men who are a bit desesperated could fall down easily into this trap, you will be always in a secondary priority plan,because the kid will always came first ,after why the girl was let alone with the kid is another story, it's very disturbing,and you will became soon or later her full time psychotherapist,yeah great, i don't need of your nevrosis,because i have allready some troubles to manage my existentional problems