Rule 34 Dev - 2016 all_fours anthro anus athletic backsack balls bent_over biceps blue_eyes bottomless brown_penis brown_skin classroom claws clothed clothing dinosaur duo erection fersir flaccid furry furry_only grin hoodie humanoid_penis kloogshicer looking_back male male_only markings muscular muscular_male nude pants penis pose precum raised_tail reptile scalie school shirt spreading stripes student teacher theropod trevor tyrannosaurus_rex uncut unprofessional_behavior yaoi|2161273192