Notes:

Originally from Bryko on Tumblr:
http://bryko.tumblr.com/post/78504942510
The episode in question is "So Many Birthdays," and as the title says, yes they managed to somehow get in a "whacking" joke (why does it still surprise me what some G and PG-rated cartoons get away with?). All credit for this expand dong image goes to Bryko, I'm just posting it here in hopes some fellow Steven Universe fans find it amusing. (also interestingly this is my first image upload)