While some of these sexy memes cross the line and get pretty offensive, it’s all in good fun. Since then, we’ve seen cats playing the piano and tons of memes While there are plenty of clean memes, there are just as many dirty memes for adults that are just as funny. The World Wide Web was technically invented in 1989 by British scientist Tim Berners-Lee but it wasn’t until the late 90s that “going online” started to be mainstream.