Re: How you feel about "sharing" make-up?
You just gotta learn to say "NO!"
It's something I had a lot of difficulty learning to do, but it's worth it.
If you don't want someone touching your stuff, why should you have to hide it away?
Also if that person can't appreciate why you said no, they probably aren't the sort of person you should allow near your stuff anyways!
I will happily lend my Bf a lip balm, and nail polish is like currency in my social circle, but if it's going on my face no way!
The part that gets me SOOO MUCH! is when people borrow without asking, "Oh hai, I jest used tha last of yer favrit impossible 2 replace gold indian liner, but it'z kewl, coz I'm sorry!

"
I used to happily share anything with my friends but now I'm pretty shitty about lending anything all, it either comes back tainted or not at all!