FURVERT!

anthro backsack balls big_balls big_penis canid canine canis castbound domestic_dog erection flexible foreskin genital_raphe genitals hi_res humanoid_genitalia humanoid_penis looking_at_viewer lying male mammal muscular on_front penis raphe_(anatomy)red_eyes retracted_foreskin russell_(castbound)scrotal_raphe shaft_divide short_tail shortstack solo splits spread_legs spreading tail tongue tongue_out vein veiny_penis