GBSA-060 The husband's strange hobby is watching his wife have sex with other people

"At this rate, we'll lose interest in each other as members of the opposite sex." Met and got married as a college circuit OB and a senior. My wife has only had male experiences with her husband, and she has made an effort to see AV as a couple because of the lack of SEX variations, but since 5 years ago, she has been without sex. At that time, at work, I decided to draw male and female bodies using my wife and male students as models. Seeing his wife embarrassed in front of many people's eyes made him feel agitated, unable to control the fantasy of his wife being hugged by another man.