NIH hosts papers. It is not an authority by itself.
The NIH paper is from the following authors:
Haseeb Mehmood Qadri, corresponding author 1 Abdul Waheed,1 Ali Munawar,2 Hasan Saeed,3 Saad Abdullah,4 Tayyba Munawar,1 Shaheer Luqman,1 Junaid Saffi,1 Awais Ahmad,5 and Muhammad Saad Baba r6
1 Surgery, Lahore General Hospital, Lahore, PAK
2 Surgery, Shaikh Zayed Hospital, Lahore, PAK
3 Pathology, Allama Iqbal Medical College, Lahore, PAK
4 General Surgery, Allama Iqbal Medical College, Lahore, PAK
5 Surgery, Jinnah Hospital, Lahore, PAK
6 General Surgery, Lahore General Hospital, Lahore, PAK
Pakistan may have a strongly religious influence on its faculty... and I'm going to ask what expertise surgeons have on the subject mater compared to the layman.
Also those only focus on the user. The pornography business itself is a lot more horrible as it's closely linked with sex trafficking.