rule 34 2019 abs anthro balls biceps big penis breaking the fourth wall burrserk chin claws digital media artwork dinosaur foreskin genitals gesture looking at viewer looking down maku male male only muscular muscular male nipples pecs penis pointing pointing at penis red eyes reptile scalie scar simple background solo teeth testicles theropod thick thighs tyrannosaurid tyrannosaurus uncensored vein veiny penis 3806622