A new study has found that women have a greater variety of bacteria on their hands than men do and that everybody in general has more bacteria than expected. A total of 4,742 species of bacteria were identified with the average hand harboring 150.
Researchers are unsure why hands of women are more bacteria prone but believe it may be related to their less acidic skin. Other possibilities are moisturizer and cosmetic applications, sweat and oil gland and hormone production and skin thickness.
Regular hand washing did not eliminate bacteria, researches note, saying that the colonies may reestablish quickly after hand washing. When asked if guys should worry about holding girls hands, a researcher quipped "I guess it depends on the girl."