After a spanking or caning, it is usually traditional to send the naughty boy to stand in the corner. Here he can spend some time to think over his past behaviour and resolve to try harder to be good in the future. His nose is firmly pressed into the corner and he must keep his hands beside him (or on top of his head if more discomfort is desired). Any attempt to rub his hot, sore bottom is likely to draw further punishment, so he is well advised to stand still and not to attract further attention from his Mistress.
The unfortunate young man in the picture above has also been deprived of his clothes and is required to stand naked, with his well-caned buttocks in full view. The additional shame and embarrassment may serve as a salutary warning to mend his errant ways!