rule 34 abstract background anthro anus balls bodily fluids cheek tuft cum cum from ass cum in ass cum inside facial tuft flaccid genital fluids genitals grey balls grey body grey penis hi res horn humanoid genitalia humanoid penis hybrid licking licking lips licking own lips looking at viewer looking back looking back at viewer male male only mammal murid murine nude penis perineum portrait presenting presenting anus rat rear view retracting foreskin rodent smile smogville solo spread anus spreading standing sweat sweaty balls sweaty genitalia three quarter portrait tongue tongue out tuft 8450366