"Leach insisted her findings should not be interpreted as a demand that mothers stay at home. Instead, she described it is as supporting a demand for 'developmentally appropriate high quality childcare'."
I would insist that it should be interpreted that way. If you really care about your children and love them you will want what is absolutly the best for them. So to the extent that you are able you now have a list to go down. Do you have the money to stay home? Do you have enough life insurance so that your wife can stay at home with the kids if you die? As a single mom - can you aford a nanny - is Mom in that role? Having sex is complicated - it is best that it only be carried out by responsible trained persons.