I'll make my point without sarcasm then: Asking for proof that "men need fathers" is so common sense and obvious that denying it suggests to me that there is no evidence that you would accept. If you're serious and actually want me to find you studies, please describe, in detail, what evidence would change your mind. I want to have a clear understanding of the requirements and goal posts before I make effort towards that. If you don't want to do that, then unfortunately I can only conclude the question was in bad faith.