Ways to Avoid Make-up from Harming Your Eyes

Ladies, when you walk into a beauty shop or your local beauticians, do you request a clean brush to test the make-up or lipstick or do you use what has already been used? Do you share the same brush for your make-up or the same lipstick or lip gloss with your friends? How often do you clean the brushes you use? Do you check your product expiry date?