FURVERT!

absurd_res anthro anus back_markings back_muscles backsack balls butt butt_focus butt_grab canid canine canis dark_back dickinoatmeal domestic_dog erection eyes_closed foreskin fur genitals german_shepherd hair hand_on_butt herding_dog hi_res humanoid_genitalia humanoid_penis leg_grab legs_up looking_back male mammal markings muscular muscular_male nude pastoral_dog penis perineum playful playful_face pointy_ears presenting presenting_anus presenting_hindquarters prick_ears puffy_anus raised_leg raised_tail rear_view simple_background solo spread_butt spreading tail tan_balls thigh_grab vein veiny_penis