Think Amazon and the fast delivery of a seemingly endless array of products comes to mind.

It is that, but there is a darker side.

Try "gratuitous nudity and simulated sex scenes." Think "child-like sex dolls." Think "eroticized child nudity." Think "incest, babysitter, and group-sex themes."

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That's from the "Dirty Dozen" list compiled by the National Center on Sexual Exploitation, which each year "exposes and calls to account groups, agencies and businesses that contribute significantly to the normalization of sexual exploitation."

The center, which ranked Amazon No. 1, explained, "This list ensures that their participation and collusion with the various aspects of the sex trade becomes public knowledge and equips citizens with information and tools to hold them accountable."

Since it began the lists, it has been behind 98 policy improvements in corporations and government entities, the report said.

"No corporation should profit from or facilitate sexual exploitation," said spokesman Haley Halverson.

"Amazon, the world's largest online retailer" is "promoting material that sexualizes children and normalizes the dehumanization and sexual commodification of women," the group said.

"Items for sale on Amazon include child-like sex dolls, photography books with eroticized child nudity, pornographic magazines, and clothing items, and more. Their Kindle e-reader is riddled with sexually explicit content containing incest, babysitter, and group-sex themes."

No. 2 on the list is EBSCO Information Services, which offers contract services to customers, including school districts.

"In its advertising for schools, it promises 'fast access to curriculum-appropriate content.' However, its Explora, Science Reference Center, Literary Reference Center, and other products, sometimes provide easy access to hardcore pornography sites and extremely graphic sexual content," the report said.

No. 3 is Google, for its Chromebooks, which have been found to provide "unprotected and unfiltered" web access for students.

"Google could easily turn on a default setting for safer use by children," the report said.

HBO is No. 4.

The report calls it "an American premium cable television network that has consistently produced content which normalizes rape myths, sexual violence, and commercial sexual exploitation … with sexually exploitive depictions of sex and sexual violence. This has been displayed over the years through shows like 'Game of Thrones' and 'The Deuce.'"

Massage Envy is No. 5. The company "has been and is being, sued by hundreds of women for failing to take appropriate measures when a massage therapist sexually harasses or assaults a client. Among a number of poor policies, the company has hidden clauses in customer agreements which force women to surrender their rights, and many former employees report being trained to do all in their power not to encourage police to show up at their locations."

Then comes Netflix.

"Netflix sinks to storytelling which portrays gratuitous nudity and graphic sex acts in shows meant for teen and young audiences. Further, Netflix portrays graphic and violent depictions of sexual assault in a number of their shows and has even produced shows normalizing sex trafficking and eroticizing children. Netflix allows a loophole for children to easily get around parental control features and it regularly recommends children’s content paired right next to NC17 and TV-MA content," the report said.

Governments aren't exempt, with Nevada No. 7.

"Nevada is the only state in America with legalized brothel prostitution, in select counties. As of February 2018, there were at least 21 brothels active in Nevada."

Online streaming service Roku is No. 8, for its provision to users of "the ability to stream television programs, movies, music, and more, on their personal devices. Unfortunately, Roku also facilitates access to hardcore pornography."

Sports Illustrated magazine's swimsuit issue is next.

It has "objectified women for sport and profit" since 1964, the report said.

"The images … are designed to portray women as sexually desirable and available to the male customers purchasing this magazine."

Steam, another distribution platform, is No. 10.

It has featured rape themes and nudity in video games.

"There are over 2,000 games with this [nudity] tag," the report said.

Twitter and United Airlines rounded out the list. Twitter for is lack of efforts to stop sex trafficking, prostitution and pornography and United for not only its porn in the air but its sexually hostile environment.

It has not made efforts to "keep customers safe," the report said.

Also-rans included Snapchat, Verizon, the Department of Justice, Carl's Jr., American Apparel, Comcast, Hilton and Hyatt.