1. Some people give off a bug-attracting scent

Verdict: True

Some sweat is tastier to bugs than other sweat, says Brian Allan, Ph.D., an assistant professor of entomology at the University of Illinois at Urbana-Champaign. So shower up before the pool party, and take occasional dips during. (Speaking of pool parties, try these 6 Best Foods to Grill for dishes your guests will love!)

2. You can develop a bee allergy as an adult

Verdict: True

There's a slight risk of an allergic reaction after a sting no matter what your age, says David Golden, M.D., an associate professor of medicine at Johns Hopkins. If you have symptoms of an allergic reaction within an hour, head to the ER.

3. Citronella candles repel mosquitoes

Verdict: Sort of

Citronella can reach a max repellency rate of 22 percent outdoors, according to a 2009 study. A better bet: Buy a diffuser with geraniol. This plant-derived oil had a 75 percent repellency rate within 20 feet, the study found.

4. Mixing sunscreen and bug spray is okay

Verdict: False

An Australian study found that applying them at the same time lowered the repellent's effectiveness. The CDC advises applying sunscreen 20 minutes before you spray. Reapply sunscreen every hour or two, and use bug spray as needed. (Does Sunscreen Cause Cancer? Find out the truth behind controversy brewing in the supermarket aisle.)