There is no blame on them to mingle with their fathers, their sons, their brothers, their brothers’ sons, their sisters’ sons, with other women of them and their right hand possessed women; and you heed Allah, indeed Allah is the witness upon each and everything.
The men and women who have become believers by testifying Adhikr-the Best Interpretation of the Lord’s Book Adhikr, and are conveying It to the entire mankind can mingle with each other and can eat food in groups as explained in verses 24: 60-61. As explained in verse 38: 24, the men and women who hide and reject Adhikr, if they mingle, will desire intercourse with one another. That is because they do not make their Jinn comrade believers with Adhikr-the Permission of the Lord to become believers. During their prayer and their sexual intercourse with their spouses, they are recording in the Recording Book fastened around their neck the sexual organs of other opposite genders. On the Day of Judgement, while reading their Recording Book, these Mujirims will be wailing about what is in it saying ‘What a Book is this! It avoids nothing small or great unless it is recorded’ as explained in verse 18: 49. See explanation 2: 62; 3: 102; 6: 28.