Some pages also publish videos secretly recording boys and girls in parks under the guise of awareness material.
A Facebook page with 1.9 million (19 lakh) followers, which mainly focuses on women riding motorcycles, reportedly uploaded a 43-second video of two youngsters to warn parents.
The video, said to be recorded on April 15, has received over 3.7 million (37 lakh) views with nearly 143,000 reactions, nearly 7,500 comments and over 1,500 shares.
A private Facebook profile written in English with about 4,000 followers has a secretly recorded 29-second video with an obscene caption that has been viewed 65,000 times.
Another similar video showing an intimate moment between a man and a woman has been viewed more than 70,000 times. A separate Facebook page with an English name has garnered nearly 78,000 views for similar content.
Although Prothom Alo has access to the details of these profiles and pages, it has not published them in line with editorial policy.