While baby Lex, pretending to have the body of an adult, was sitting and sipping some unknown drink with the tavern owner who he previously assaulted and then healed, fairy Lex was figuring out the dynamics of being a fairy.
His body was absolutely feeble, which was something that should be expected, but Lex really wasn't used to anymore. Running around, he felt like the guy experiencing his first day at the gym after years of being a couch potato. Suffice to say, his body was not cooperating with him.
The body also had instincts of its own that he wasn't used to yet. To say that fairies were more sensitive to spiritual energy than humans was an understatement. It was almost as if spiritual energy was in love with him. It constantly hovered all around him - it was the air beneath his wings and it was the literal sparkle in his eyes.