You’re overthinking it. The sex Jink just happened, he went out got laid, was able to clear his mind and sleep. He noticed he won the match the next day, retested his theory and than the sex Jink was born.
That was his "ritual" for a good match, drink his milk (cause in the past didnt have milk) then after a bath he puts cologne (cause people called him dirty and smelly) and also the sex so that he wouldnt nightmares.
You’re overthinking it. The sex Jink just happened, he went out got laid, was able to clear his mind and sleep. He noticed he won the match the next day, retested his theory and than the sex Jink was born.