Remember when they told us that mascara was only good for 3 months? And remember how we all rolled our eyes and said "kiss my ass- I just paid $25 for this." Despite our (quite normal) reaction to the rule defined by the makeup gods, it has quite a bit of logic to it. Apparently bacteria gets into your mascara increasing your risk for an eye infection. Now, does that change the fact that I hoard mascara for at least a year? Absolutely not- but the information is helpful should you not enjoy eye infections.