ETA: Our agony shall shall endure a week longer as John adds his (stoopid and useless) voice to the debate.
Panel 1: It's night-time at the Pattermanse and John and Elly have settled down for a night's sleep. He tells her that Connie came by while she was out and she was depressed.
Panel 2: As he puts his glasses on the nightstand, he says he wishes he could have said something to cheer her up.
Panel 3: He doesn't know what to say to crazy, emotional nutcases (because he has a penis).
Panel 4: He delivers the punchline by telling Elly "So I told her to wait until you (who have a uterus and thus can discuss emotions) came home."
Summary: It might look as if John is simply overwhelmed by dealing with the desperately needy psycho and only wanted backup but that's not the case as far as Lynn is concerned. John, you see, would have referred to Connie, owing to her being a woman, as an emotional nutcase if she'd came over and said the sky was blue or two plus two equals four.