FURVERT!

animal_genitalia animal_penis anthro balls bernese_mountain_dog black_balls black_nipples breasts canid canine canine_genitalia canine_penis canis collaborative collaborative_fellatio collaborative_oral collaborative_sex domestic_dog erection eyes_closed fellatio female female_penetrated genitals group hi_res holding_another's_knot holding_another's_penis holding_knot holding_penis knot knot_grab knot_lick licking male male/female male_penetrating mammal molosser morticus mountain_dog nipples oral oral_penetration penetration penile penis penis_lick piercing retracted_sheath sex sheath swiss_mountain_dog tail tongue tongue_out vein veiny_knot veiny_penis