FURVERT!

2012 against_surface against_wall anthro anus backsack balls bent_over biceps big_butt butt canid canine canis drake-van-howler erection genitals hi_res humanoid_genitalia humanoid_penis looking_at_viewer looking_back male mammal muscular muscular_anthro muscular_male nude penis pose presenting presenting_hindquarters raised_tail solo spread_legs spreading tail vamplust wolf