Missed one small detail
All this talk about "porn", but they don't ever say what they mean by it. From their little poster, it appears that"sex" is synonymous with porn - at least in their world. So are "adult websites". Should we therefore conclude that when they refer to porn, they simply mean anything of an adult nature - including, presumably "adult" i.e. cert 18 films?
So what it seems to boil down to is that in a world populated overwhelmingly by adults, a significant proportion of web traffic, searches, emails and websites either contain or are there to satisfy people's needs for adult material?
Maybe the real problem is that stunted individuals who felt the need to produce this chart - and the research behind it aren't mature enough to have a "grown-up" discussion about the topic. If they were, they'd realise that there's a tremendous amount of sex going on - everywhere (hint: that's why there are nearly 7 billion people on the planet, and more every day) and that it's a big part of lots of people's lives. To deny it's there or to consider it a bad thing seems rather foolish.