Etiquettology of borrowing

I would like to believe that common courtesy is the primary rule of harmonious living.
I would like to believe that it still exists.

I am very particular about my stuff, my belongings. I'd like to be owning them with happiness inside my personal space.
Therefore, I really, REALLY hate it! when people borrow aka use my stuff without my permission. You'd think "eh, logically speaking, they should ask before they borrow something"
But yeah, logic doesnt really co-exist all the time with the thing named human.

Like,
I hated it when my sisters borrow my clothes
I hated it when my housemate used my bedroom to sleep in when her family came
I hated it when I wanted to wear some shoes, then, oh, somebody borrowed it
I hated it when people use my car.
without asking me first.

I'm so sorry, I love you guys to bits, but this is really my pet peeve, and its really annoying. But I find it hard to tell logically thinking people, "hey, I found out you worn my shirt the other day. why didnt you ask first?". and when my housemate told me "hey, I used your room to sleep in the other day, because my family came and they slept in my bedroom. and thank god, you forgot to lock your door, or I couldnt have taken advantage of your forgettery stupid brain" oh well, she didnt really say that, but really, I felt like I have been used like a nobody without any respect. and I really hate conflicts..and sometimes I just let it be but my heart was raging with wrath.

Its not like I'm possessive or stingy with my belongings. I dont mind lending my clothes, my room, my shoes, my car to someone, but, like, HELLO, its COMMON COURTESY to ASK FIRST! I'd love to think that, once I own something, I would have the luxury to use it whenever I want, without figuring out that I cant use it because someone has used it without telling me first. and most important and the biggest deal of all, its a sign of RESPECT towards me. respect that you acknowledged me as the owner, respect that you know I'll be nice enough to let you use my things, respect towards anything I own, that I have put my best efforts in choosing or taking care of. Please, RESPECT ME.


Its kinda hard sometimes, because I usually arrange my outfit with a holistic approach. and if I cant wear THE shoes, I have to re-arrange the whole ensemble. I dont mean to sound so vain, but its just me.

Anywaysssss....asking permission, just say, "can I, please?" (yes, I really love it when people care about the P's and Q's)
Am I too scary to ask from? (FYI, I dont bite. really.)
Is it too much to ask??

yesss...its common sense...I've written a blog about it here, but thats a different story I guess :P