<P> In Vietnam the gesture is considered rude, especially to another person . Referring to female genitals, it is comparable to the finger in western culture . </P> <P> In German - speaking countries and also Sweden the gesture is only known for vitiating oaths . Wishing for luck is gestured by pressing thumbs . The same gesture is used in many Slavic countries such as Poland, the Czech Republic, Slovakia, Russia, Bulgaria and ex-Yugoslav republics . </P>

Where does the superstition of crossing your fingers come from