where did the superstition of crossing your fingers come from
Crossed fingers The origin of the gesture traces back to the biblical Kingdom of Israel. Courts of Mosaic law would often render verdicts with the phrase "May God have mercy upon your soul" in order to reaffirm God's supreme authority over the law. Most judges felt that while they could pass a sentence of death upon a person, they personally did not have the authority to destroy souls and that only God had the authority to do that.[4][5][6][7][8] As a result, some judges would cross their fingers whenever they said the phrase as a result of concern for the criminal's soul as they said it as a prayer.[9][10][4][5]
The finger The gesture dates back to Ancient Greece and it was also used in Ancient Rome. Historically, it represented the phallus. In some modern cultures, it has gained increasing recognition as a sign of disrespect, and has been used by music artists (notably more common among hardcore punk bands and rappers), actors, celebrities, athletes, and politicians. Most still view the gesture as obscene. The index finger and ring finger besides the middle finger in more contemporary periods has been likened to represent the testicles.[2]