QUESTION:
In which of these areas is there more bacteria?
A - Toilet seat
B - Keyboard
C - Toothbrush
D - Kiss

SOLUTION:
In which of these areas is there more bacteria?
A - Toilet seat: 20 bacteria/cm2
B - Keyboard: 8.000 bacteria/cm2
C - Toothbrush: 4.000.000 bacteria/cm2
D - Kiss: 32.000.000 bacterias pass through your mouth in a simple 10 seconds kiss.

*according to a University of Arizona study. (2014)