Shoya no technique (1972)

A virgin husband and a lustful woman pretending to be a virgin, Umi, are about to spend their wedding night together. The husband, textbook in hand, is alas! He climaxes just before he can enter. His wife's frustration with his nightly premature ejaculation finally explodes! She fantasizes about her love affairs with former lovers and lesbian friends and masturbates intensely, but that's still not enough, so she straddles her sleeping husband's crotch and shakes her hips... A hilarious and entertaining comedy porn film!