Islam is a religion of brain washing which starts from birth (by saying azan in a newborn’s ears). More brainwashed is the Muslim, more religious he becomes. For example, you often wonder why Muslim women cover their hair and faces and muslim men grow beards. Women are brainwashed that for Allah, woman’s face and hair are like her private parts, and showing them to any one other than husbands is as sinful as showing their private hair and private parts to someone other than husband. That is the reason Muslim women cover their hair and faces out of shame. Same way they are brainwashed that they must be circumcised to avoid lewd and sinful desires leading to adultery and hellfire.
Men are brainwashed that growing beards elevates their sexual power greatly to enable them to fully enjoy multiple wives and slave girls. They give the example of their prophet who had a very long beard which enabled him to enjoy his many young wives and slave girls even in his old age. Here is a famous hadith:
Bukhari, Volume 1, Book 5, Number 268:Narrated Qatada: Anas bin Malik said, “The Prophet used to visit all his wives in a round, during the day and night and they were eleven in number.
No wonder all Muslims eagerly grow beards. Even the ones converting in prisons immediately grow long beards. Here is a cleric on that topic: