Mistress Natasha did not want to go far to look for something to use in punishing her slave. She had to get something easy to use and she chose her socks. She had smelly socks and she used them to punish and to dominate the guy. It all worked out the way she wanted it to happen. The mistress head crushed the guy to get to the bottom of it all.
Mistress Natasha knows it when a loser is into her. She likes it because it gives her a free pass to have fun at the expense of that loser. Alex was the loser in this case and when she realized he had a crush on her, she led him on and made him smell and lick her socks pretending that it turned her on. The guy endured the terrible smell but never got the reward he was seeking.