A: Hey there. I can't help but notice you drove into work in a nice new SUV today.
B: Yeah, it's pretty great.
A: I thought we talked about this? That gets terrible gas mileage, you're kind of robbing the future generation of limited resources.
B: You know, that's actually why I decided to get it.
B: Well, you know I'm against same-sex marriage.
A: Wait, are we still having the same conversation?
B: Against women's ordination. Against abortion...
A: Right, all terrible beliefs on your part.
B: So you say. And you keep telling me future generations are going to look back on me with disgust.
A: They are.
B: Which is why I decided, I don't really give a shit about these arrogant future-twerps.
A: What!? But they're our children! Our children's children!
B: You see me with any kids?
A: Okay, but they're other people's children!
B: Yeah, other people's kids are pretty annoying *now*, pal. The point is, when I'm constantly reminded of the disgust and smugness a bunch of people regard me with, my desire to sacrifice to help them out fizzles out like a bug fart. Why - Christ aside, for a moment - should I sacrifice anything for people you're convinced will hate me?
A: That's a terrible attitude!
B: But eminently sensible.