Sorry, I lied. This one is a serious gem. I mean, the other ones are really typical of the time, but this one has the best conversation from the 1950s that I've heard thus far:
"Hey, you know something?" "No, what?" "I had a wet dream last night." "A wet dream, what's that?" "Oh, you know, sperm comes out of your penis." "Sperm?" "Yeah, sort of a sticky stuff, a guy's part of a baby. Didn't your brother tell you about that?" "Nah, he doesn't tell me about much of anything. So...you can start a baby now..."
Now, I wasn't born in the 50s, and I've never talked to anyone in the 50s about this, but I'm pretty sure that it wasn't a typical scene to have guys sitting in the grass around a push mower talking about their nocturnal emissions...but hey, I could be wrong. I could be grossly misinformed about an entire era of United States history.