Akamamushi is an energy drink with extracts of snakes inside. That's propose is to strengthen men's sexual power 😂 And the way Ken san is scolding his wife is after Japanese old tradition that the father or husband is at the highest status of a family(亭主関白). It's superficial, however, and mother or wife is strongest in most situations(夫が妻の尻に敷かれる)😂