Is it permissible for spouses to look at and touch the entire body, including the ghilaza (gross) 'awrah, during intercourse, and what precautions and supplications protect them from jinns seeing or harming them during intercourse?

It is permissible for each spouse to enjoy the other, including looking at and touching the 'awrah (private parts), based on the saying of the Prophet, peace and blessings be upon him: "Guard your 'awrah except from your wife or what your right hand possesses."

As for concealing oneself from the jinn, we are not obliged to do so, though it is commendable. It is possible that a jinn may become attracted to a human female if he sees her naked, and their harming of humans is established.

To fortify oneself against the jinn, one must adhere to obedience and frequently remember Allah Almighty. In the Hadith: "...And I command you to remember Allah, for the likeness of that is like a man whom the enemy swiftly pursues, until he comes to a strong fortress and secures himself from them. Likewise, a servant does not secure himself from Satan except by remembering Allah Almighty." And whoever says "There is no god but Allah alone, without partner, to Him belongs sovereignty and praise, and He is over all things competent" a hundred times, it will be a protection for him from Satan on that day.