Before a guy fingers you are supposed to shave your vagina?

No you do not have to shave your vagina. Shaving your lady parts is a personal decision that has no bearing on sexual acts. 'Fingering' involves stimulating mainly the inside of a female and has nothing to do with the hair on the outside. Some people like to have their partners shave them as part of their sexual play, but it has no impact on 'fingering', so do not worry about that. Hopefully this is a safe and good relationship.