Rule 34 Dev - 2017 2boys 4_fingers anal anthro anus ass backsack balls bent_over big_thighs biped black_and_white blush butt_grab claws dripping duo ears_back eyewear faceless_male fur gay glasses half-closed_eyes hand_on_ass hi_res humanoid_hands humanoid_penis licking line_art looking_pleasured male male_only mammal monochrome nude open_mouth oral penis perineum precum rat rimming rodent sex simple_background sketch slimeymonsterguts solo_focus spread_ass spreading sweat tongue tongue_out vein veiny_penis whiskers white_background yaoi|2782833376