FURVERT!

2_penises 4_balls all_the_way_through anthro balls blush bodily_fluids canid canine canis collie diphallism domestic_dog erection genital_fluids genitals gizmo_props herding_dog hi_res knot longblueclaw lube male mammal masturbation multi_balls multi_genitalia multi_penis muscular muscular_male nude pastoral_dog penetration penis penis_tongue plantigrade precum sheepdog sitting solo threaded_by_object u-turn_penetration unusual_anatomy unusual_genitalia_placement unusual_penis_placement urethral urethral_all_the_way_through urethral_masturbation urethral_penetration urethral_threading vertical_diphallism what