This is why I believe people should not be rushing into relationships and start living together.
kathryn_d, a second thing that we agree on!
Who'd've thunk it?
Like you, I don't think that "living together" is wise
before deciding whether you're in a committed relationship; it seems to be the norm now that when you get a boyfriend/girlfriend, you just naturally will live together.
The biggest negative, in my view, is that
it prevents people having to make a conscious decision. If you're madly in love and not living together, it brings the situation to a head - you have to decide to make a commitment and live together.
If you just live with somebody who you're half-hearted about, the temptation is to just amble along through life, not particularly enamoured with the person you're co-habiting with, but can't be bothered changing the status quo. You've made a "half commitment", and there's insufficient motivation to either go the whole hog and make a commitment, or to break up. I think that many "de facto" couples, if they had to make a firm commitment (ie marry or break up), would break up - and probably be happier, either on their own, or by finding somebody to whom they could make a full commitment.
If you are really great together, co-habiting can give a commitment-phobic partner an excuse to not have to commit, which can leave the other partner (if not a commitment-phobe) "settling" for co-habitation when they really want to be married.
Decide whether you're a committed couple *before* you live together, and there's a much greater chance that you're headed for long-term happiness.
I don't know why anyone would want to co-habitate with someone they did not trust.
I used to feel the same way. But... I do see, with the benefit of life experience, that even the nicest person can become completely unreasonable in a divorce, and that even with the best intentions in the world to "be together forever", life can take unexpected turns and any one of us may find themselves in an unanticipated divorce. (Though avoidable divorces still make up the vast majority, I'd agree.)
So I don't see a plan for a BFA being about
distrusting the other party, but about "planning for the worst", much as we have insurance. Particularly where there is a great disparity between assets going in to the relationship, or where children from prior relationships are involved, I think it's wise to address the issue up-front - then hope you never need it.