That plastic backing for earrings? Turns out it's totally useless.
Keep or Remove? The Mystery of Plastic Discs on Earrings Unravelled! | Eternal Collection | Blog
Pierced Earring Protector Covers Anti-Sensitive Piercing Protectors with Extra Backs Pierced Earring Sleeves for Sensitive Ears Plastic Clear Earrings for Men Women Girls (100 Pieces) - Walmart.com