In case you missed it, PornHub just released their year in review for 2018 and it is absolutely exhaustive. The site was visited 33.5 billion times (as they point, the equivalent of the populations of Poland, Australia and Canada visited the site very day), which means PornHub may be uniquely situated to tally some worldwide numbers that no one else can. Not to mention that it's just interesting to see what people really watch in the heat of the (alone) moment and the comfort of their homes, as most people probably aren't broadcasting this kind of information (with some notable exceptions).
Pornhub begins their list with what they call the "searches that defined 2018," a list that seems about right. The first place on the list is Stormy Daniels, who was bound to be there as a porn star and also one of the biggest stories in American politics. But then it gets more interesting. The second search is Fortnite, which is a little surprising considering it's a video game but also only natural considering the popularity of the game. As the people at Pornhub put it:
Fantasy plays a big role in pornography (and indeed in human sexuality), so it’s only natural that people will desire seeing sexual scenarios involving the game characters they emotionally connect with. In April when Fortnite’s servers crashed, searches for Fortnite increased by as much as 60% over a 24 hour period.
The rest of the list is, in order: 4k, Romantic, Trans, Outdoor, Tattoos, Tinder, Bowsette and Threesome. The Director of Pornhub's Sexual Wellness Centre describes how this list is not just about watching sex: “searches like these serve as an indication that people use this site to not only satisfy sexual urges but also to get a different angle on something they are already interested in. To see a famous character or hot topic in a sexual context.”
See the full insights page here.