Someone thought me and my asian friend were brothers.
That happened to me and my friend in Jr High (middle school)
Other party: "Hey, you're brothers! You have the same last name!"
Me: "No we're not! We're in the same grade and our birthday's not the same! What's your birthday?"
Friend: *Response*
Me: "What the..."
Friend: "Why, what's yours?"
Me: "Same as you."
My brother and I though... people are generally surprised we're siblings.
"WHAT?!?! You and he are brothers???"
"Yup."
"Oh... Hmm, actually I sort of see a resemblance." (I generally believe this statement to be bullshit and/or an after the fact pattern association)