Rule34.GG

Regular almost fully inside
anthro
ass
bear
belly
big bad bear
big belly
bigbadbear
closed eyes
comic
crouching
duo
feet
felid
forced
graphite (artwork)
gulp (sound effect)
head first
lion
male
male/male
mammal
monochrome
navel
nude pred
nude prey
onomatopoeia
oral vore
pantherine
partially inside
prey in mouth
pubes
rear view
simple background
size difference
slurp
slurping
sound effects
swallowing
tail
teeth
text
traditional media (artwork)
unwilling prey
vore
white background