Frequent strong language and racial epithets, but nothing a public school middle schooler wouldn't be familiar with. 'Meme' sex, below, means non-explicit pictures bumping into each other (which can still shock). Probably post-sex ed is a good idea before you let them run free. MM is not made for kids, but some parents have said they watch (presumably some) episodes with their kids, and the Murdochs are happy for whatever kids can watch, see: AMA 2, starting at 6:20.
Sex (worst first)
Trudeau's Diversity-a-thon - pretty realistic 'cartoon' ejaculation, 'meme' homosexual sex and bestiality.
Against Time - 'meme' homosexual sex and drug use.
My Name is Aids Skrillex - 'cartoon' ejaculation with dildos.
Mandell's Milk - 'meme' ejaculation and homosexual sex.
Face the Strange - implied homosexual sex.
Last Son of the West - two topless women's breasts are groped (footage from Woodstock '99), some performer sits astride a giant stage penis.
Return of the Swede - 'meme' bestiality.
#brave - Caitlyn Jenner and Putin have meme hetero sex.
Gore (worst first)
Guardian of the Rune - Guy gets ripped in half, there are somewhat gorey corpses (cartoon, I believe).
Border Runners 3 - a guy's head gets blasted into chunks.
Dr Murdoch's No Good Very Bad Week - a guy gets run over (the gore looks real).
Burqas in Bongland - half of a corpse that looks like it's mostly returned to the Earth.
Ghosts of America - 'meme' - a black man's face slides down Murdoch's body.