I didn't mean to make John look so gay. I mean, yeh, but no. He's just giggling and also holding his harmonia or harp very...gaily. Oh, and gazing into Paul's huge blackholes of eyes.
If you haven't, listen to "No Reply (Demo)" and "And Your Bird Can Sing" on the Anthologies. It's all OH-EM-GEE GIGGLEFEST. They're very hard to listen to without cracking a smile.