3:4 ambiguous_species anthro arthropod backsack balls balls_expansion bodily_fluids brood egg english_text expansion felid feline foreskin genital_expansion genital_fluids genital_transformation genitals growth hi_res humanoid_genitalia humanoid_penis infestation insect insectophilia inside_balls internal male mammal merging monochrome oviposition ovipositor parasite partial_transformation penetration penile penis perineum precum solo swollen_balls testicle_pregnancy text transformation uncut