Are there a lot of people worried about this? Does it matter in some way?
I only ever heard of Mary's one. I read such "on the record."
If there were more, show me the record.
Only to those who overstate Mary's role in the God's redemptive plan. Mary was esteemed in God's sight, so for that reason we should show her respect as well but she was a bit player, not the co-star in God's redemptive plan. Mary was the fulfillment of God's prophesy of a virgin birth but John the Baptist was a prophetic fulfillment, too. He fulfilled God's prophesy as the "Elijah to come" and was praised by the Lord Himself that "none born of woman was greater than John the Baptist." Yet for some reason, John the Baptist doesn't seem to generate the same level of speculation.
I find the extra-Biblical speculation embodied in Mariology very troublesome and not at all compelling. If Mary had other children besides Jesus through perfectly lawful sexual relations with her husband, Joseph, how does that, in any way, diminish the fulfillment of virgin prophesy or make her any less righteous?
Well... 115 replies later, it appears that yes; there are a lot of people worried about this. Yes; it does matter in some way.
And just think! Think of the dozens of FReepers who have read the comments and said to themselves; "Wow! I've apparently been wrong on the subject. Based on these replies; I'm changing my mind!"