please don't slap me
"You're very reliable, but don't push it."
"Push what? I've been around for quite a long time, you know!"
"A little too long, sometimes I think. You're almost as bad as Moebius."
"So, age before beauty. Maybe you owe me a little leeway. It's not like I know when I'll croak any better than I did last time."
This kind of senseless back-and-forth fit fairly easily into their routine; a break between oversights.
"If you did start croaking, I don't think I could stand you."
"Hey, you won't be there to see it happen."
"You're right there - and thank goodness."