Origin story jokes

I can explain Superman and Batman movies in one sentence.

Two orphans fighting in the rain.

Kid: I want to be Batman.

Okay, when he gets home, his parents are dead.

Ever wonder where people got their surnames? Mr. Baker was probably a baker. Mr. Butcher was probably a butcher. And then there was Mr. Dickinson...

My sister and I were both adopted from the same country, and my parents say they got us on a "two for one special."

One man's trash is another man's treasure... Wonderful saying, horrible way to find out you're adopted.

I asked my mom where babies come from. She said I came from the adoption center.

Alex: Dad, can we get me a little brother from the orphanage?

Dad: Sure, Alex! We're here!

Orphanage manager: Alex! You are so big now!

Alex: Dad, what is she talking about?!