anus blue_body blush bodily_fluids butt dripping feral genital_fluids genitals humanoid_genitalia humanoid_penis hybrid_genitalia hybrid_penis knot knotted_humanoid_penis looking_at_viewer looking_back looking_back_at_viewer male penis precum precum_drip presenting presenting_hindquarters presenting_penis quadruped raised_tail solo urethra vein veiny_knot veiny_penis frenchsparrow eeveelution generation_1_pokemon pokemon_(species) vaporeon