fully erect inside sheath

When a male, typically a canine but not restricted to them, has a full erection but their sheath is not fully retracted. This is most commonly seen in canines as the knot, once it swells, will become too large to exit the sheath. For an image of a canine to qualify for this tag, there must be a visible knot-bulge! A canine's penis is not fully erect until the knot has started to swell. Most other species may only qualify for this tag when the sheath is being physically held in place over the erect penis by a hand or other means, as most will lack a knot to do so from inside.
Remember, knot-bulge or externally held in place over the erect penis, otherwise a full erection is likely not present.

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animal_genitalia animal_penis anthro anus butt canid canine canine_genitalia canine_penis canis eyewear feet fluffy fully_erect_inside_sheath genitals glasses hi_res jewelry knot_in_sheath lavasi long_sheath lying male mammal multi_nipple multiple_poses necklace nipples pawpads paws penis pose presenting presenting_anus presenting_hindquarters rear_view sabbyth scruffy sheath solo sprawled stretching text toes url wolf
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1:1 4_toes against_surface against_wall alley alternative_fashion animal_genitalia anthro balls barbell_piercing blue_body blue_clothing blue_fur blue_hair blue_shirt blue_topwear bodily_fluids boots bottomwear box brown_body canine_genitalia carrying_another carrying_partner claws clothed clothed_sex clothing container crossed_legs cum cum_in_sheath cum_inside cutaway denim denim_bottomwear denim_clothing devious_grin digitigrade dim_lighting dominant dominant_male dorsal_spikes dragon duo ear_piercing ears_back ears_down erection eye_contact feet fetishame fingerless_gloves footwear from_front_position frottage fully_erect_inside_sheath fur furry_specific_accessory genital_fluids genitals gloves gold_piercing hair hand_on_hip handwear hi_res holding_partner horn hybrid hyena internal internal_sheath jeans knot knotting legs_around_partner legs_around_waist looking_at_another looking_at_partner looking_pleasured male male/male mammal markings mohawk mythological_creature mythological_scalie mythology night orgasm outside outside_sex pants penetration penile penis penis_in_sheath piercing pink_clothing pink_hair pink_penis pink_topwear pink_vest pivoted_ears public public_sex punk purple_lighting rear_view retracted_sheath ring_piercing scales scalie sex sharp_teeth sheath sheath_knotting sheath_penetration sheath_play shirt shoulder_pads shuck slim_male smile spiked_shoulder_pads spiked_tail spikes spikes_(anatomy) spread_wings standing standing_sex step_pose straddling striped_markings striped_tail stripes submissive submissive_male tail tail_markings tail_tuft teeth three-quarter_view toe_claws toes topwear trash_can tuft vest whisker_spots whiskers wing_spikes wings xray_view yebra
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animal_genitalia anthro balls bottomless canid canine canis caught caught_masturbating caught_while_cumming clothed clothing domestic_dog duo exhibitionism eyewear finger_in_sheath fully_erect_inside_sheath genitals german_shepherd glasses herding_dog hi_res long_sheath male male/male mammal on_lap outside park pastoral_dog penis plant public reach_around rex_(slushee.) sabbyth sheath sheath_play sheath_pull sidewalk sitting sitting_on_lap slushee. small_penis_exposure tree voyeur wolf
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ambiguous_gender animal_genitalia anthro belly_rub blue_background bodily_fluids brown_hair canid canine canis disembodied_hand duo eyewear finger_in_sheath fluffy fully_erect_inside_sheath fur genital_fluids genitals glasses hair hi_res human jewelry leaking_precum long_sheath lying male mammal molestation necklace nude on_back penis precum sabbyth scruffy serialdad sheath sheath_play sheath_pull simple_background solo solo_focus tuft white_body white_fur wolf
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