When I was in college, my then girlfriend texted me that she was watching Jojo Rabbit. She knew it was one of my favorite movies, and said that she loved it too. She was talking about how Scarlett Johannson's shoes almost have their own personality. So I said,
spoiler
yeah, it's devastating when you notice her shoes on the hanging body.
Turns out she had paused the movie to make some dinner, and hadn't seen this part yet. Needless to say, she was PISSED!
Not me, but I had a friend with a brother who was a year younger, and when they got in a huge fight, he told him he was adopted.
I'm not sure why a parent would let a kid make it to 16 and hide that type of secret.
Side note, I have an aunt that I didn't know was adopted until I was 30. Looks just like her sisters, and I never asked until she mentioned it as she felt less than her sister.
Damn, I tell my sister she's adopted all the time. She probably isn't.
spoiler
You're the adopted one.
Dude, spoiler tags!