"No, no, clearly he likes to talk. But perhaps he doesn't like to talk to people about his eye?" Delta certainly doesn't like to talk about his hearing, which is just about the only thing he doesn't go on about.

Omega taps the table to get Delta's attention. "You're working backwards. He started talking to you. He didn't know what you were getting repaired or how much it was going to cost. So what could he have to pity? Can you think of any other reason a sociable guy like that would talk to you?"

Omega can think of a few, but Omega talks to strangers all the time, out of boredom. Which is not pity.