A chart claiming that one country “uses adult websites the most” can look scientific because it contains percentages. Usually, it is measuring a narrower thing: estimated traffic to a selected group of domains during a selected period. That is not the same as measuring a country’s population behavior.
Total visits and share of traffic answer different questions
A populous country can generate enormous absolute traffic while a smaller country generates more visits per internet user. A ranking is meaningless until you know whether it uses total visits, share of site traffic, visits per capita or another denominator.
Third-party analytics tools model the web
Similarweb says its estimates combine direct measurement, contributor networks, partnerships and public data, then use modeling to create traffic estimates. That makes the data useful for trends, but it is not the same as a national census of every browser session.
VPN use and device signals complicate geography
Similarweb says it uses multiple signals rather than relying only on an IP address to assign country traffic, and it documents specific handling for VPN behavior. Other analytics providers may use different methods, so results are not automatically interchangeable.
Blocking, age controls and local platform preferences change what is observable
Legal restrictions, ISP blocking, privacy tools and local alternatives can move traffic away from the domains included in a ranking without proving that underlying interest is higher or lower.
Treat the chart as web analytics, not anthropology
Ask which sites were measured, which devices were included, how geography was assigned, what the denominator is and when the data was collected. Without those details, a country ranking is mostly a provocative headline.