"How Did You and Mom Decide to Start a Family, Dad?"
(Paraphrased)
Adult son: How did you and mom decide to start a family, dad? How'd I get here?
Elderly father: Well, hell, I liked to screw , and your mother was raised Catholic. I figured if we screwed enough, we'd likely end up with a couple of kids. And that's what happened.
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Some "family talks" can be very illuminating!
Second place:
Adult son: Why didn't you divorce mom?
Elderly father: What...and just end up with another woman giving me sht?