rule 34 2023 antennae anatomy anthro anus ass backsack balls bat biped blue markings bodily fluids colored digital drawing artwork digital media artwork dragon duo erection foreskin from behind position genital fluids genitals glans grey body grey penis horn hot ging hybrid imminent sex komuros machine male malemale mammal markings metallic body multicolored body nude male on top on top of penis penis backwards perineum precum raised tail rear view red markings retracted foreskin robot sex signature simple background speed bump position synth vader san tail tail aside throbbing penis weath verncel white body wyvern yellow body yellowluster 9053502