I have heard and used the arguments in other thread concerning this teaching. I have not heard this point made or a rebuttal.
The following is from a protestant friend:
The first being that the catholic church insists that Mary the mother of Jesus maintained her virginity throughout her life. Even though the bible says that Jesus had brothers and sisters. Not only that but Matthew 1:24 says "Then Joseph, being aroused from sleep, did as the angel of the Lord commanded him and took to him his wife,
and did not know her till she had brought forth her firstborn Son. And he called His name Jesus."
The [font=Arial Black]hebrew names version says it this way, “and didn’t know her sexually until she had brought forth her firstborn son. He named him Yeshua.” [/font]
Here is the Link to the Hebrew Names Bible Translation of Matthew 1: 24-25
Which the translators claim it is a modern translation of The American Bible: