rule 34 2021 5 fingers anthro balls big penis bodily fluids canid canine canis collarbone dobermann domestic ear piercing ear ring facial piercing fingers front view genital fluids genitals grey background half erect harness hi res humanoid genitalia humanoid penis leaking precum male mammal monochrome motion lines muscular muscular male nipples nose piercing nose ring one eye closed pecs penis piercing pinscher precum prick ears sarquiat signature simple background solo standing vein veiny penis 5386555