abs anthro anus balls bara barazoku big_balls big_penis butt desert erection gaping gaping_anus genitals hands_behind_head legs_up lying lying_down male muscular muscular_anthro muscular_male nipples on_back penis sharp_teeth sky solo spread_legs spreading teeth vein veiny_penis wasteland rulethony34tano_(director) fallout deathclaw monster reptile scalie tail