rule 34 2014 after orgasm after sex all fours anthro anus ass backsack balls biped black nose blush canine cheek tuft circumcised cum cum in ass cum inside cum on butt cum on penis cum on tail cum string dipstick tail disembodied penis duo erection fur fur markings gaping gaping anus gloves marking head tuft humanoid penis inner ear fluff log artist looking back male mammal markings multicolored tail open mouth penis perineum precum purple eyes raised tail rear view sex signature simple background solo focus tuft vein white background yaoi 2846782