Ladies, Am more interested towards lipstick. Have few questions for lipstick experts here.. 1. When to change lipsticks? I have many old ones with me(2yrs old). Is there any expiry date for lipsticks also? Is it good for lips to use oldones? 2. How to choose colour of lipstick.. I hate very dark and very light colour ones 3. Lip brush - where to get? is it online?