Since I am very fond of Catholic Jason AUs (and his alternative priestHOOD), I thought what if, after being adopted by Bruce, Jay wanted to have his First Communion. Maybe he just grew up in a Catholic household (Catherine was a believer or his neighbours) and thought it was a normal step in any child's life. So when he heard that Bruce was going to do a gala for him, he asked if it would be similar to a First Communion party. If he really wanted to spend a lot on an event, couldn't Bruce just do a First Communion party for him.
This also prompted one of the first civilian family photos.















