4-panel-comic by War and Peas
Panel 1:
Mary and Joseph are inside a barn. Mary, visibly pregnant, stands next to Joseph, who is sitting on a chair and writing in a book. Mary says, "Joseph, I think I'm pregnant."
Panel 2:
Joseph, looking determined and says, "Impossible, Mary! We used my patented pull-out technique!"
Panel 3:
Mary stands with her arms on her hip, looking unimpressed ands says, "Well, it didn't work." Joseph is holding his head in his hands, looking distressed and says "What am I going to tell my shareholders?"
Panel 4:
Thirty years later, Jesus sits on some steps, talking to his disciples. He says, "So I must be the son of God or something."