FURVERT!

abs anthro anus backsack balls bent_over biceps big_butt big_muscles big_penis brown_body brown_fur butt canid canine canis collar domestic_dog erection fur genitals gunther_renato looking_at_viewer male mammal mastiff molosser muscular muscular_anthro muscular_male nude penis pose presenting presenting_hindquarters raised_tail ressie rottweiler solo spikes spread_butt spreading tail