Rule 34 Dev - 2019 anthro anthro_on_anthro anus backsack balls blush bondage bound bovid bovine brown_fur butt_sniffing cattle collar erection evil_grin fence fingers forced fur grass green_scales half-closed_eyes handcuffs hill hooves horn humiliation leash lizard looking_back looking_down looking_up male mammal mud nose_to_anus nude open_mouth outside penis perineum pink_penis puffy_anus raised_tail reptile scales scalie shackles size_difference sky smile smirk standing tongue tree vallus yaoi yellow_scales|3461704928