Rule 34 Dev - age_difference beaker black_hair blonde_hair can closed_eyes clothed_male_nude_male clothed_on_nude cmnm desk draco_malfoy erect_nipples flaccid_penis gay hand_on_cheek harry_potter imminent_sex jar lamp long_hair male nude older_man_and_younger_boy on_back on_desk open_jacket parchment potion quill scale severus_snape tagme teacher_and_student unprofessional_behaviour vial yaoi|301384248