Father: "Son, you were adopted."
Son: "What?! I knew it! I want to meet my biological parents!"
Father: "We are your biological parents. Now pack up, the new ones will pick you up in 20 minutes."
Son: Dad, I have black skin and you have white skin, are you sure you're my parents?
Dad: Oh... well I never thought it would come to this, or to your head that you were kidnapped...
Son: Am I kidnapped?
Dad: Well, you're adopted, and if you want to see your biological parents, they’ll be waiting for you in heaven.
Walk up to an adopted kid and ask this, "How's your biological parents? Are they well?"
What does Batman have that Superman doesn't?
The ability to visit his biological parents' grave.
Cousin: Hahaha, I am their biological parent.
Kid: So what? At least they love me more.