Koichiro Uno's Wet and Riding (1982)
Original title: 宇能鴻一郎の濡れて騎る
Koichiro Uno's Wet and Riding is a 1982 Japanese-language comedy movie directed by Junichi Suzuki, with a running time of 1h 7m. It stars Junko Asahina, Reiko Natsu and Maki Kawamura.
Yoko is a housewife who's frustrated by her husband's lack of virility. She finds solace in erotic daydreams, the ministrations of a condom salesman and, eventually, the partner-swapping lifestyle.