rule 34 age difference anthro anthro penetrating anthro penetrating human asriel dreemurr balls bare chest blue balls blue body blue boxers blue fur blue penis bodily fluids boss monster bottomwear bovid boxers clothing brother brown bottomwear brown clothing brown hair brown pants caprine clothed clothing comic crotch lines cum cum drip cum in mouth cum inside cum on chin deathheadmoth00 deltarune dripping duo erection erection under clothing faceless character faceless male fellatio flaccid foreskin fur genital fluids genitals goat green clothing green shirt green topwear hair hand on head hands above head happy hi res holding head human human on anthro human penetrated humanoid genitalia interspecies kris deltarune larger anthro looking at another looking at genitalia looking at penis male malemale male on anthro male on human mammal midriff nipples older anthro open bottomwear open clothing open mouth open pants oral oral penetration pants partially retracted foreskin penetration penile penis sex shirt sibling size difference smaller penetrated smile solo focus standing stare sweater technical tenting tongue topwear undertale undertale series underwear undressing ventral groove video games white body white fur young younger human younger penetrated 5355999