yes, i always do that thing when im in my restroom at office.
like " hey, new mascara? can i try?" of course i can't say no
or like i always did " oh my gosh, i forget my red lipstick, you bring yours? can i use it?"
maybe its so not healthy, but what more should i do?
their my friends, an it would be so rude in my country tradition if you did the opposite.
but i always try to bring my own make up.