A charge can exist between human bodies and this can lead to a discharge. This happens when the charge between bodies is different in polarity and/or the difference between the similar charges is high enough. The discharging or the normalization of the difference between the charges occurs when people touch eachother. This discharging of the electrical charge can be felt by means of a little shock. Sometimes it can also be heard. To read more about static electrity please check our FAQ.