1. They start to smell.

Remember the smell of innocence of your baby brother? Well, not anymore. He now smells like rotten onion.

2. They start to swear.

Woah, did I just heard that correctly? Where did you learn those? You know that is not nice, just… don’t say those around mom.

3. They suddenly think you are not cool anymore.

What do you mean you don’t want to binge watch 5 seasons of "Teen Wolf" with me? It was like our thing.

4. They reject any sign of affection from you.

5. They become stronger than you.

Remember when your brother was being an idiot and you would just slap him in the head? Well now if you do that you will end up with a black eye.

6. They are taller than you.

Wait… since when are you taller than me? I have to look up to you now? For real? But last week I swear you were shorter than me.

7. They start shaving.

What? You have to shave? Wait you are only like 8…right? Aren’t you too young to be shaving? Doesn’t that happen when you are like 20 or something like that?

8. They start dating.

A date? Oh like you are going with a group of friends and some girls. No? What do you mean no? a date as in alone? But you haven’t hit puberty in my head.

9. They get your problems.

You’re really good with advice, I should come to you more often.

10. They still love you even if you are their annoying older sibling.

Yes, I love you too… Don’t worry I won’t tell anyone you said it.