I have seen many pictures and video’s showing how NOT to use a wooden paddle. The pictures were not presented with an educational purpose, they just show they did know what they doing.
Since paddles are seldom used correctly, it’s not unusual to read that they are not at the top of most gals fav toys. Words like brutal and thuddy are commonly used.
When used on the upper part of the bottom, thud is guaranteed and probably also soreness. If that’s your thing, go for it. For sting, the paddle should strike the lower meaty part of the bottom. To achieve this may take some time to get both the target and the paddler in the proper position. Let’s consider the simple position of bending over. The spankee’s back should be angled down slightly, about 15 degrees below a right angle to the legs. [Grabbing the ankles, compresses the bottom too much] The bottom should be over the feet. This “stuck out” position is ideal.
The paddler needs to be in a position so they can swing slightly upward to make contact just above the line between the bottom and the legs.
The paddle needs to land flat, not even slightly on the edges. The sound will tell when the paddle lands correctly. Both will hear a crisp crack. The paddlee will feel sting, not thud.
I prefer alternating the paddle from cheek to cheek. This makes it much easier to ensure the paddle contacts flat. Also, you get full force on one cheek at a time.
The paddler should stand so that the paddle hand is just forward of the target. Hold the paddle with your thumb on top; the same as the bottom hand on a golf club. Just before contact, allow the paddle to swing forward, snapping into the target and with follow through.
Here Becall demonstrates proper technique. Note her thumb on top. All of the redness is from the middle down. This is what I consider to be the prime paddling area. From the middle of the bottom down the legs. As always, your mileage may vary.
As to paddle size, a thinner, lighter paddle provides more sting.