The clothes went ignored. That was a matter for another time. If Loras had to practice in tighty whities, then that was what he did, and he'd done it before. He wasn't worried about attire. There was something more pressing....
Obi, as it was, wasn't taking his hand. Loras stepped forward, into Obi's personal space with his hand persistently extended. "If you can't even shake a man's hand," he said, canting his head to the side, "Then you won't do very well in this. Respect for your opponent, and for others is always key."