Why do people believe anything they read on the Internet?

I saw a comment on Reddit a few days ago claiming that there is a place in Africa where women are hypersexual and seduce outsiders who visit. The comment had 30 likes, and everyone seemed to believe it. However, when I Googled it, I found no proof except for a shady article. I then asked a friend of mine from Nigeria, who is knowledgeable about different African cultures, and he said the article was BS. Coming back to the question, why do people believe things without questioning their authenticity? Misinformation is a huge issue on the internet.