Yes, I understand you, it's worse and it may have left some marks or scars? For my part, I prefer real training for a whole period but that didn't stop my bitch from going to work the next day.......
In real-time, I have experienced worse than 20 - 30 .. or a simple cane/ whip mine had beads and also a chain whip many times that whip was kept in a hot pan for 15 min before it was used on my naked body.
The whip is much more suitable for training females to obedience. One day it's a training session on the buttocks, the next day, the breasts, then the thighs (especially inside, the perau is very thin). And we start the cycle again..............