According to Google trends 2011, not the western world sex is most searched by the Pakistanis and India is in the second position. IP address information from server logs are used to guess the user trend. Goggle trends authority admits that there is inaccuracy issue. This conclusion was drawn by computing searches made by the users relative to total number of searches.
There is another interesting result which says there are eight Indian cities among the top ten cities in the world from where sex is the most searched term.