My contention, kosta, is simply that these things cannot be affirmed in scripture. That's the point, and that is the only point.
They can be affirmed by scripture + something else.
I would argue that the perpetual virginity cannot then be 2000 years old. There were no church fathers writing approximately one decade after the birth of Christ. The only ones writing were those who recorded instances during Christ's ministry on earth, approx 3 decades later.
Since there is no clear presentation of any perpetual virginity in scripture, the best you can say is that the perpetual virginity was taught from about 18 or 19 hundred years ago.
Inasmuch as it is not specifically spelled out, yes, but it doesn't mean that it is not hinted. Besides, the Gospels were written to tell the world the truth about Christ, and did not focus on His Mother unless she was directly involved.
It would have bene not only dangerous to include her, for the possibility that she may be worshipped by some, but also neither would she, in her humility, ever wish to draw attaention awya form her Son and onto her.
Christ is a Mystery that is not ours to "understand." If we believe in Christ, we beleieve that nothing about Him is "natural" or "usual," whether it is his seedless Incarnation, His miraculous Birth, or His death.
Given what we do know of her, we could safely say that her womb became the Tabernacle, and I seriously doubt that any of the apostles or fathers would have ever thought of it being violated after Christ's Birth.
Nor is there any clear indication that it was.