Sexual Identity in 1958, from comedian Shelley Berman.

We only hear his side of the call.

He phones his sister, but his very young nephew answers instead. Hilarity ensues.  https://www.youtube.com/watch?t=300&v=nWwUgjkOHAA 

 

Finally (at 7:52 in the video) his sister comes to the phone.

Do me a favor, tell my nephew he's a boy, will you?

He doesn't know. He doesn't know! I asked him before, he didn't know what the hell I was talking about!

What do you mean, "he's a baby"? Now is when he should know! Now, during his formative years! Don't wait till he grows up and makes an arbitrary decision!

Originally on the LP Inside Shelley Berman.