YOU SAID:

There are men who do things of a sexual nature to the hindquarters of another man

INTO JAPANESE

別の男性の後部に性的な性質のことをする男性がいます

BACK INTO ENGLISH

There is a man in the back of another man who does sexual qualities

INTO JAPANESE

別の男の後ろに性的資質をしている男がいます

BACK INTO ENGLISH

Behind another man is a man with sexual qualities

INTO JAPANESE

別の男の後ろには性的な資質を持つ男がいます

BACK INTO ENGLISH

Behind another man is a man with sexual qualities