One of the points at the end is protection of private parts from Djin. This is true to some extend. I married a Muslim woman and the marriage was hell. The woman was tortured by spirits. When she goes to bathroom somebody stood outside to assist her if Djin attacked.

If thus was limited to her we could think that it could be some kind of delusion. But slowly slowly it started attacking me. In Islam you can not remain aloof. Powerful spirits will haunt you till the time you submit to Allah. They do so much in the physical plane where they could be caught. So you can guess how much more they would do on spiritual plane.