the bottom is always the area of focus in my case....though the backs of thighs have been included at times. I try to cover the entire bottom whether the spanking be fun/playful or disciplinary. This becomes more so in regards to "party play" ( have to avoid the SDS syndrome
) The implement being used does have a lot of influence on the specific spot swatted though. Hand spankings and paddlings work out nicely for covering the entire bottom, as do most straps. Smaller implements like the hairbrush make it easy to concentrate on the lower portion of the bottom and with the cane, I always focus about mid bottom to the sit spot ( and even more so to the sit spot if the caning is disciplinary)
Gary D.