User blog comment:Miskos3/Fairy Tail Chapter 388: Erza vs. Minerva, Review/@comment-24277053-20140613150437

If you go by my theory Jiemma was disappointed he didn't have a son, so let me compare him to someone. Let's Gildarts and Jiemma, first of all Gildarts is stronger than him, so a man of a greater strengh, when he found out a daughter he was so happy so proud. He didn't have a problem with Cana being a girl, while Jiemma on the other hand a weaker man, was in his mind stuck with a daughter.