I've written in the past about how and why it is more difficult to make friends in your 30s, and referenced the Seinfeld episode in which Jerry makes this observation, so I was interested to read that Jo's husband Alex has written a piece for the New York Times on just this topic (I know! Why am I writing on this here humble blog and not for the New York Times?).
And because it is Friday, I give you the Seinfeld clip (you can't embed it sorry, but it is worth a click).