Use both hands and slowly build up those callouses. As a former pimp, there is an art to slapping hoes. The level of transgression not only determines which hand gets used, but from what angle, how far back you rear and the velocity.I've bitch slapped that clown so many times that the back of my hand is sore.
Bitches learn quick when they figure out the pattern. Even then, every once in a while you simply have to slap a bitch to keep all the hoes in line.