Fitting rooms

You won't pick up much from the hooks or the chair. The germ culprit? What you try on. "After people try on clothing, skin cells and perspiration can accumulate on the inside," says Tierno. "Both can serve as food for bacterial growth."

You can even pick up antibiotic-resistant bacteria, such as MRSA (methicillin-resistant Staphylococcus aureus), just by trying on clothes, says Tierno.

Protect yourself: Always wear full-coverage underwear (no thongs!) when trying on clothes, especially pants, bathing suits, and any other garment that touches your genitals or rectum.

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