YOU SAID:

he jacks off watching the young girls through the window

INTO JAPANESE

彼は窓越しに若い女の子を見てジャックオフ

BACK INTO ENGLISH

He jacks off looking at a young girl through the window

INTO JAPANESE

彼は窓越しに若い女の子を見てジャックオフ

BACK INTO ENGLISH

He jacks off looking at a young girl through the window