animal_genitalia animal_penis anthro anthro_on_anthro ball_tuft balls big_sheath black_body black_fur brown_body brown_fur canine_genitalia canine_penis close-up countershading detached_sheath duo faceless_character faceless_male fur genitals grey_body grey_fur knot knot_in_sheath knot_root knotting male male/male multicolored_body multicolored_fur navel nude penetration penile penile_penetration penis penis_tip pubes sex sheath sheath_penetration sheath_play simple_background tuft white_background director_aislopper canid canine canis dobermann domestic_dog mammal mastiff molosser pinscher rottweiler wolf hi_res story story_in_description
>sheath knotting
>imagine the pressure inside
>and the pleasure, feeling your bro's cock and knot so deep in your most intimate place
>feel him keep your own cock flaccid via the immense pressure despite your pleasure levels high
>feel his cock struggling to grow to full size inside that tight furry prison
>he manages to slip his knot inside
>reach pain threshold as he knots your sheath and cums, pressing his whole body tightly against you as he's filling you up
>claw on him in desperation while he's riding out his climax
>both of you whine in pleasure and pain as you realize that his knot won't go flaccid for another 15 minutes
>he apologizes and promises you to take your cock up his tailhole as soon as he unknots you