Princess Serena has a pair of stinky socks that she does not like cleaned. She used this pair of socks to humiliate anyone she feels deserves to be humiliated. She loves to torture him or her by making him or her lick her feet. She likes to have the socks smelled and her feet to be licked to an extent that they do not have any smell. That is when she feels satisfied and can let the slave or loser go.