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.