Just remembered an odd situation. So here is what happened:

This was a few months ago before I started reading TRP. Sister comes to my room, I'm gaming, having a blast with my friend on skype. My door is half open so she knew what I was doing.

She comes in and says some thing like: "Can you take out the the trash, its ready in the kitchen." Or something like that.

This means, she took the bag of trash out of the bin and just left it in the kitchen. She then went to my room, which is on the floor below. So the way she would have to take the trash anyway, and then a longish hallway to my room, which lies in the opposite direction of the trash location.

So in the time it took her to come to me, she would already have brought out the trash and would be halfway back to her room (easily).

I answered with: "Why dont you do it? Well... Okey im busy, ill do it later, I guess." Then I added: "In the time you came to my room it would already be done!". She then angrily leaves and throws something at me like: "Mimimi... always I have to do everything... so unfair blah blah blah... your doing nothing all day".

Fact is, she is lazy and I clean good and efficient and I cook sometimes too, if anything I do more work around the house then her.

How does stuff like this happen and why do they do it?