They love the idea of them, but have no real clue how they operate.
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SOURCES
Yeast Infections: a vaginal infection which can cause pain while urinating, irritation, itchiness and discharge
http://www.mayoclinic.org/diseases-conditions/yeast-infection/basics/definition/con-20035129
http://www.webmd.com/women/tc/vaginal-yeast-infections-cause
Toxic Shock Syndrome: a disease caused by a toxin produced by certain types of Staphylococcus bacteria. Often associated with the use of tampons, though it can also occur in men and children.
http://www.ncbi.nlm.nih.gov/pubmedhealth/PMH0001676/
Discharge: secretions from the vagina, produced by glands in the cervix and walls of the vagina, which can vary in consistency and color
http://www.nlm.nih.gov/medlineplus/ency/article/003158.htm (you should probs refer to it as vaginal discharge)
Cramps: mild to severe pain in the lower abdomen and back that can occur before or during menstruation
http://www.webmd.com/women/menstrual-cramps
(FYI: Dysmenorrhea is the medical term for "cramps")
HPV: The most common sexually transmitted infection in the US. Some types of HPV can cause genital warts and cancers, but vaccines can help prevent them.
http://www.cdc.gov/std/hpv/STDFact-HPV.htm
Periods: a discharging of blood, secretions, and tissue debris from the uterus that recurs in non-pregnant breeding-age females at approximately monthly intervals
http://www.merriam-webster.com/dictionary/menstruation
UTI: an infection of the urinary tract, caused by bacteria that enter the urethra and bladder
http://www.nlm.nih.gov/medlineplus/ency/article/000521.htm