Rule 34 Dev - anal anal_knotting anal_penetration anal_sex animal_genitalia anthro anthro_on_human anthro_on_male balls biceps big_dom_small_sub blush canine canine_penis consensual cum cum_in_ass cum_inside duo fur gay hair head_grab homosexual human human_on_anthro humanoid_penis internal interspecies knot knotting male male_on_anthro male_only mammal moon muscles night nomozuni nude outside pecs penetration penis pull_out redrusker sex size_difference uncut werewolf wolf x-ray yaoi|1872855976