In The Name of Allah, The Most Merciful, The Bestower of Mercy.

Abu Hurairah [may Allah be pleased with him] reported that Allah’s Messenger [peace and blessings of Allah be upon him] said, “Indeed, from the perfection of a person’s Islam is leaving that which is of no concern to him”. [Hassan Hadith. Reported by Imaam Tirmidhi and others]

The idiotic bid’ee Muhammad Hijaab asked married youth how many times they have sex every week?!

فمن حُسن إسلام المرء تركه ما لا يعنيه، التَّدخل فيما لا يعنيه قد يُسبب مشاكل، فمن حُسن إسلام المرء، ومن حُسن إيمانه، ومن حُسن سيرته: عدم التَّدخل فيما لا يعنيه،
فالإنسان إذا ابتعد عمَّا لا يعنيه، ولم يدخل في مشاكل الناس، ولا في سؤال فلانٍ وفلانٍ عمَّا لا يعنيه، فهذا هو من كمال إيمانه؛ لأنه قد يدخل في شيءٍ يضره، أو يُشوش على غيره، أو يُسبب فتنة

Imaam Abdul Azeez Bin Baaz [may Allah have mercy upon him] said: From the perfection of a person’s Islam is to leave what does not concern him. Interfering with what does not concern him may cause problems. From the perfection of a person’s Islam, from the perfection of his Imaan, and from the perfection of his conduct is not to interfere in what does not concern him. Therefore, if a person distances himself from what does not concern him- neither interferes with people’s problems nor asks so-and-so about what does not concern him, then this is part of the perfection of his Imaan, because indeed he may enter into something that either harms him or confuses others, or causes trial. (1)

Finally, even though every sane person may regard Muhammad’s question as very strange, intrusive, disrespectful, or vulgar; however, his bidah is worse than this question. Read on the link by Shaikh Abu Iyaad [may Allah preserve him]: Muhammad Hijab, the Falasifah, Mutafalsifah, and Jahmiyyah: Laying the Foundations for the Dīn of the Philosophers and Jahmites:

http://www.aqidah.com/creed/articles/fespl-muhammad-hijab-the-falasifah-mutafalsifah-and-jahmiyyah.cfm

Ref1:https://binbaz.org.sa/audios/156/6–%D9%85%D9%86-%D8%AD%D8%AF%D9%8A%D8%AB-%D9%85%D9%86-%D8%AD%D8%B3%D9%86-%D8%A7%D8%B3%D9%84%D8%A7%D9%85-%D8%A7%D9%84%D9%85%D8%B1%D8%A1-%D8%AA%D8%B1%D9%83%D9%87-%D9%85%D8%A7-%D9%84%D8%A7-%D9%8A%D8%B9%D9%86%D9%8A%D9%87