One more question to discuss...
Do you know the -sad- story of crown prince of Castile and Aragon Juan, brother of our Catherine? Juan was the most loved one, both of his father and his mother, but also of his sisters. They were shocked when he died after six months of his wedding to the beautiful and gentle Margaret of Austria. It´s possibly that Juan died from tuberculosis, but, at this time, people believed that he was died because he had ruined his health sharing so frequently the bed of his lovely wife.
When Catherine married Arthur of Wales, she was a pretty girl aged seventeen. She had a good constitution, she was not weak and sickly. So, I suppose that her parents were not worried about a possibly consummation of her marriage. Of course, they never hurried her...two years without sex were two years without the risk of pregnancies and childbirth. But they were not afraid, I think, about a physical relationship between their daughter and her husband.
Arthur was never a robust child, and he became an unhealthy young man. In order to protect him from suffering the ill-fate of prince Juan, they parents wished to await a long time before a physical consummation of the marriage with Catherine. The news that some people of Catherine´s house sended to the castilian court were that the princess remained as a virgin. Ferdinand of Aragon, an old fox, was convinced about this, and convinced was, also, his clever wife Isabella of Castile.