Thank you Doug. I agree, you did say that.
It is true that we must put the passages that talk about Jesus brothers/sisters in context. The entire context of the NT Scripture shows that there is NO
definitive statement that Mary had other children.
Not once does the NT mention the “sons of Mary” or “a son of Mary,”
but only the son of Mary. Scripture does allow for Jesus "brothers" or "brethren" (depending on the translation) to be cousins by the use of the word adelphos, however, when one takes the entire context of the NT Scripture and tries to make them blood brothers
it just isn't there. 
For you to suggest that the person who wrote The Protoevangelium of James 1,900 years ago (closest to the life of Christ) didn't use
common sense and that 500 years ago the men of the Reformation did use common sense
is not logical.
The big three Reformation leaders, Calvin, Zwingili and Luther
all believed in Mary's perpetual virginity sooooo you accept the "common sense" of the men who were
the Reformers of the Reformers. They started a new traditional teaching of Scripture based on their interpretation of Scripture and they rejected the teachings of The Reformers. I accept the "common sense" of the men who lived closest to the life of Christ who had the ringing of the Apostles teaching still in their ears.
Mary