Can a jinn touch or have sexual intercourse with a human without them feeling it, and what is the benefit of learning self-defense against jinn, and is Satan present in the bathroom when supplicating the prayer of entering the restroom, and why did Allah grant jinn this ability, and do jinn disappear in Ramadan?

The Holy Quran is the best cure for demonic possession. Legitimate protective invocations and remembrances (adhkar) shield one from devils, such as reciting Ayat al-Kursi before sleep, and the supplications for entering the toilet. Reciting Surat al-Baqarah in a house expels devils from it.

As for a jinn touching, sleeping with, or having intercourse with a human without their awareness, there is no definitive proof of this. However, some scholars have mentioned the possibility of this, based on Quranic verses such as: "And share with them in wealth and children" [Al-Isra: 64], and "Whom no man or jinn has touched before them" [Ar-Rahman: 74]. A woman may or may not feel this. Some scholars have mentioned that jinn may have sexual relations with women.

A Muslim defends himself with divine protections. In Ramadan (definition), devils and rebellious jinn are chained, which reduces their dominion. However, some scholars believe that this chaining may not include all of them. Nevertheless, maintaining regular remembrance (dhikr (definition)) prevents the devils' dominion. Legitimate ruqyah (definition) (exorcism) has a significant effect in protecting against devils.