You finally arrive at the park, where nobody is around... except for your best buddy James!
James looks up and sees you hanging from a branch. Laughing, he tells you: "Hello Tarzan! Me James!", then continues: "So you chose the loincloth, great choice! I've always liked Tarzan."
That confirms your suspicions: James sent you that box! He caused your transformation!
You jump to the ground in front of James, and ask him: "Why James do this? How?"
He chuckles. "You see, I've been secretely studying magic for years, and for years I've been hiding a big crush on you. Now I've decided to change you to suit my fetishes: I'm sure we'll have lots of fun together!"
You're stunned. On the one hand, you feel outraged, because your friend has casted a spell on you without asking for your permission; but on the other hand, you're excited by that new situation.