Interpretation

"Where's Mark in our family, Matt?"

Matt replies, "Oh, I forgot about him. He's off the page playing with my stuff." (And maybe I need to change my profile's photo. Don'tcha love that stylish red dress on me? And how about Steve's Zac Efron-ish hairdo?)

"Your favorite sport is basketball?" Matt confirms like we should know this, "YEEAAAH!"

"And what is your favorite sport?" (We couldn't make heads or tails by looking at his drawing.) Matt replies, "Motorcycle racing!"

When did he start showing an interest in that?