What happened to the love aspect of manhood?

Why is that aspect only reserved for relationships with women as it relates to traditional men?

Why is the softer more compassionate side of a man only reserved for little children and then done away with when that son, that nephew, grandson, or brother starts getting older?

Who determined that once a boy reaches a certain age he can no longer have or experience that type of love any more from his male role models or authority figures?

Who constituted the authority to those men before us to make such a decision?

Why was that decision ever made and then allowed in the first place?

Why was it ever accepted?

Why has it not changed?