He stuck out his tongue to tast the cum, shiny from the faulty flourescent lighting in the bathroom.
He wanted to taste the cum. He scraped a handfull of it off of the stall and put it in his dirty, wet, mouth.
He grabed another, and another, and another. He was getting more aroused by consuming the cum, and he released another load.
His tongue was rubbing the crap all over his tighty whites, making his mouth all a brownish-white mess. He was biting into the sh*t and sucked it in his mouth. It was more stimulating than ever before.
It filled up all the spots in the stall that weren't covered in Dipper's cum. Once again, Dipper took big scoops of cum and consumed it in large gulps.
Now Dipper had to put the brown sticky feces all over his penis again, and boy, did he do a good job. The brown stuff was all over his external genitals, and his testicles. He had cummed a few times here and there.
Now, his beautiful, brown genitals, needed to be cleaned. so he had to suck the sh*t off.