A teen girl lifts up her skirt, lowers her panties and bends forward in front of 2 young boys. She spreads her buttocks open as the boys lean in to look and react saying "gross, why is it hairy." Embarrassed, the teen promptly pulls up her underwear. The girls anus is clearly visible in this brief yet explicit scene.
An adult woman bares her breast and allows a 13 year old boy to suck it. A much younger boy watches through a window as she grabs the 13 year old's penis and masturbates him. Then she sits in front of the boy and sucks his penis. The boy moans with pleasure throughout. The woman's breast and the boy's penis with her hand on it are shown in explicit detail.
We see an 11 year old boy masturbate twice in a row, once on his bed fully clothed and next in the shower. First time his erect penis is fully shown after he let goes of it upon climax, as it pans up to his face, it twitches once. The second time only his shaft and scrotum is visible as it pans up his naked body.
Some talk of how a boy's penis is growing and changing.