The two thirty-years-old men
When I entered the bathroom in Kobe, there was a naked japanese man getting dressed in underpants. And I said "Excuse me - is it possible to take a bath here?" He said "Oh bathroom. yes. please" with this inviting hand movement. While he dressed and I undressed, we exchanged a few words. He asked "Are you a student?" I said "Yes. And what about you? Are you a student?" "I am thirty years old" he replied.
Later that evening I met another man. We got to talking for a long time. As the conversation was winding down, I asked him his age. He said "I am thirty years old." It was quite dark in that space and I wasn't really sure, so I asked "Are you the man I met in the bathroom?"
("That's too dramatic" he replied.)