He couldn't deny that the reaction amused him, just a little. He had yet to tire of it. And given what this guy was wearing, he was from well after Robin's own time. His reaction added to that prediction.
"Seems that way," he replied, gauging the other man's reaction as he took a step closer, holding out a hand. "I'm Robin." He strongly resisted the urge to add more to that, but it was a struggle. "Have you been welcomed by anyone else yet?"