5 beauty products you should never share with your Best Friend Forever Embarrassing to-die-for secrets. Your first crushes. Your alter-ego outside of your perfect social media posts. The colour of your poop (what??? Eeks!). We get it - nothing can be TMI (too much info!) between you and your BFF. Sharing is definitely caring but before you start putting your makeup bag up as Shared Property… STOP! Simply put -- sharing skincare/cosmetics also mean trading germs, bacteria, fungi and viruses.